What is the difference between tamper-resistant and tamper-evident reporting?

Tamper-resistant = harder to alter without trace (locked PDF, signed deck). Tamper-evident = alterations are automatically detected through cryptographic fingerprinting (SHA-256, perceptual hash, edit-signature). The 2026 audit-grade bar is tamper-evident. The CMO-grade bar is even higher: tamper-proof with chain of custody and structured retention.

Does BRSR Core mandate tamper-proof marketing reports?

Not explicitly, but the reasonable assurance standard requires "sufficient and appropriate evidence" similar to financial audit rigor. In practice, BTL spend disclosures need source-record traceability, independent verification, and consistent methodology. Tamper-proof FEI reports satisfy this. PPT-only reports do not.

Can third-party auditors actually access our evidence chain?

Yes through API access. Modern FEI platforms provide auditor-grade endpoints. Independent assurance providers (KPMG, EY, PwC, DNV, BSI) review the underlying records using standard read-only access. Source records are auditable; the report itself is the visible artifact.

How long must we retain campaign evidence?

BRSR record retention minimum is 2 financial years. Best practice and tax / statutory audit alignment is 7 years. Indian Statute of Limitations for civil disputes is 3 years. Insurance / regulatory dispute windows extend to 7 years. Default to 7-year structured retention.

What is the "Campaign Health Score" and how is it calculated?

Composite 0-100 score weighing 8 verification layers (geo-verification, photo authenticity, identity verification, VER, VAR, visibility retention, creative compliance, audit pass rate). Weighted average. Disclosed methodology so CMO and audit committee can validate. Replaces "completion %" as the headline KPI.

Can we use blockchain to anchor campaign reports?

Possible but rarely necessary for BTL today. Blockchain anchoring is most useful for cross-company supply chain provenance (vaccine, food safety, premium product authentication) where parties do not trust each other. Within a brand-vendor-auditor triangle, cryptographic chain of custody + structured retention is sufficient for 2026 needs.

What happens if our agency or vendor cannot meet tamper-proof requirements?

Most India BTL agencies (top 20) can adopt FEI verification rapidly with 2-4 week onboarding. Agencies that cannot or will not are typically Tier C-D vendors whose economics depend on under-verification. Procurement RFPs increasingly mandate FEI-compatibility as a vendor qualification criterion.

How does this work for OOH agencies and third-party audit firms?

Hybrid model. Use OOH agencies for premium site quality + pre-acquisition feasibility + curated post-campaign storytelling. Use FEI (gOGig) for task-level verification + tamper-proof evidence chain. Combine outputs into single CMO report.

How long does it take to produce a tamper-proof CMO report?

System-generated. Real-time available on demand. No 2-6 week manual cycle. CMO can pull the report at 11 PM the night before the board meeting and get current state with full evidence chain. PDF, Excel, and dashboard URL all available simultaneously.

Will agencies and vendors resist?

Tier A+ agencies welcome it because tamper-proof reporting protects their reputation, supports premium pricing, and demonstrates execution quality. Tier C-D agencies resist because their margin depends on opaque reporting. The resistance is the diagnostic.

What is the smallest campaign worth doing tamper-proof reporting for?

₹5 L+ campaign budget or 100+ assets. Below this, manual sample verification is feasible. Above this, the leakage prevented (typically 8-22% of budget) is 5-10x the verification cost.

What is the single most important step we can take this week?

Add three things to your next campaign brief. (1) Mandatory live-capture photo evidence (gallery uploads disabled). (2) Server-side timestamp authentication. (3) 9-layer mock-location detection. Even without full FEI, these three discipline shifts catch ~80% of evidence-chain fraud. Add gOGig on top for cryptographic fingerprinting, identity verification, AI detection, system-generated reports, and BRSR Core-ready retention.

How do I create a tamper-proof campaign report for my CMO in 2026?

A practical 2026 audit-grade reporting playbook for trade marketing heads, BTL operations leads, brand managers, agency directors, and finance partners producing campaign reports for CMOs, audit committees, BRSR Core assurance, and CFO procurement reviews. Built around the 10-layer evidence architecture and the structured artifact replacing PPTs and PDFs with a verifiable, independently audit-able report.

4.9 / 5·

gOGig Editorial

·July 7, 2026·11 min read

Summarize with AI

ChatGPT Claude Gemini Perplexity Grok

15-20%

Higher investor engagement reported by Indian companies with robust ESG and audit-grade disclosures, per 2026 ESG research. The reporting frontier has shifted. CMOs no longer just present a PPT; they defend the evidence behind every number. A tamper-proof campaign report is no longer a design exercise. It is a board-grade artifact whose underlying data chain must survive third-party auditor scrutiny, BRSR Core assurance, and CFO procurement reconciliation.

Top 1,000BRSR Core mandatory top companies FY26-27

2-7 yrsBRSR retention minimum

Audit-gradeReasonable assurance evidence standard

100%Tamper-detection AI accuracy

A FMCG CMO has a Tuesday morning board review. Last quarter's marketing spend is on the agenda. ₹14 Cr across BTL, retail, OOH, and trade marketing. The audit committee chair asks a single question: "Can you walk us through the evidence behind these numbers?". The marketing director opens the closeout deck. 80 slides. Photos. City-wise summaries. Vendor sign-offs. The chair pushes further: "How do we know any of these photos were taken at the time and place the campaign was supposed to happen?". Silence. The deck shows installation. The chair is asking for authenticity. Six weeks later, the brand's third-party BRSR Core auditor sends a 12-page request: source data for marketing spend, evidence chain, timestamp authenticity, vendor accountability records. The deck cannot answer. This is the gap. The campaign happened. The report does not survive scrutiny. The CMO needs a tamper-proof report, not a beautiful one.

Why traditional campaign reports fail in 2026

Traditional report element	Why it is no longer enough
Vendor-submitted photo album	Photos can be from earlier campaigns, recycled, edited, or AI-generated
Excel campaign sheet	Data can be manually modified at any cell at any time; no audit trail
PPT closeout deck (80-slide)	Curated selection; not representative of execution reality
City-wise summary tables	Aggregated; per-asset evidence not traceable
Completion percentage	Self-reported; not independently verifiable
WhatsApp photo group archive	EXIF stripped (~89% on standard upload); timestamp ambiguous
Vendor invoice + delivery summary	Self-attestation; no proof of work underneath
Manager-signed approval form	Approval based on what was submitted, not what was verified
Sample audit selection (3-8%)	92-97% of campaign not independently checked
End-of-campaign master spreadsheet	Built backwards from vendor reports; not forward from field

What "tamper-proof" actually means in campaign reporting

Tamper-permissive (typical PPT/PDF)

Edited at any point by any person without trace. Photos selected by vendor or agency. Data entries can be manually altered. No timestamp authenticity. No identity verification of who submitted what when. Audit committee can ask questions; nobody can answer them with evidence. Survives boardroom but not auditor scrutiny.

Tamper-evident (2026 audit-grade)

Every data point links to a verifiable source event. Every photo carries SHA-256 + perceptual hash + edit-signature + EXIF. Every submission has server-side timestamp, 9-layer mock-location authenticity, face-matched identity. Every change is logged in audit trail. Modifications are detected automatically. Report can be reconstructed end-to-end from raw evidence. Survives BRSR Core reasonable assurance.

The 10-layer architecture of a tamper-proof campaign report

Geo-tagged evidence on every submission

Every asset photo carries GPS coordinates verified against the locked target location. Mock-location apps caught by 9-layer authentication.

Server-side timestamps on every event

Device clocks can be manipulated; server timestamps cannot. Every submission is anchored to authoritative time, independent of phone settings.

Live-capture photo enforcement

Gallery uploads disabled at app level. Photos must originate from camera at moment of capture. Eliminates the #1 source of fake evidence.

Cryptographic image fingerprinting

SHA-256 hash + perceptual hash + edit-signature detection. Catches exact duplicates, near-duplicates, Photoshopped images, AI-generated images.

Identity-verified field force

Face-match + Aadhaar identity check at field worker login. Catches substitute submission and buddy-punching at source.

Continuous audit trail

Every event (task assigned, submission created, GPS captured, AI verified, approval, modification) is logged with who/what/when in an immutable sequence.

Evidence chain of custody

Each piece of evidence carries provenance metadata from creation through transformation to report inclusion. Nothing arrives in the report without traceable origin.

AI fraud detection at scale

Manual review cannot scale beyond 5-8% of submissions. AI checks 100% for duplicates, anomalies, suspicious patterns, mock-location, edit signatures.

System-generated reports (no manual transcription)

Report PDFs, dashboards, and Excel exports generated directly from verified data without manual intervention. Eliminates manual modification risk.

7-year structured retention + auditor-grade access

Evidence stored in immutable structured retention for at least 7 years. BRSR Core, statutory auditor, CFO procurement can access source records on demand.

The evidence chain of custody (how every report number is built)

Step	What happens
[1] Campaign task created	Brand HQ defines task: Wall painting at coordinates 12.9716°N, 77.5946°E, creative variant FMCG-2026-A
[2] Task assigned to vendor + painter	Painter ID + Aadhaar locked; assignment timestamped
[3] Field execution begins	Painter logs in via face-match + Aadhaar verification
[4] Geofenced capture	GPS coordinates within 25-50m of target; 9-layer mock-location verified
[5] Live photo captured	Camera-only (gallery disabled); EXIF preserved; server-side timestamp
[6] Cryptographic fingerprinting	SHA-256 + perceptual hash + edit-signature generated
[7] AI verification engine	14 models: photogrammetry, creative match, duplicate detection, anomaly check
[8] Approval workflow	Supervisor or auto-approval (per rule); modification logged
[9] Aggregation into campaign data layer	Per-asset records flow into per-city, per-vendor, per-campaign rollups
[10] System-generated report	PDF / Excel / dashboard generated directly from verified data; no manual transcription
[11] 7-year retention	Audit-grade evidence pack stored in immutable structured retention; API-accessible for auditors

Tamper-evident metadata captured per submission

Per-asset submission field (example: 1 wall painting submission)	Value
Asset ID	WP-247
Task ID	CAMP-Q2-WP-BLR-247
Painter ID + Aadhaar	PNT-8492 / Face-match: PASS
Server timestamp	2026-05-17 11:42:18.382 IST
Device timestamp	2026-05-17 11:42:16 IST
Clock-skew check	PASS (within ±3 sec)
GPS coordinates	12.97162°N, 77.59461°E
Target coordinates	12.97168°N, 77.59459°E (8m away)
Geofence check	PASS (within 25m)
9-layer mock-location	PASS (no spoofing detected)
Photo capture mode	CAMERA (gallery disabled)
EXIF metadata	PRESERVED
SHA-256 hash	a7f8b3e9c2d1...782f4a
Perceptual hash	d72a91f8...3b4e
Edit-signature	PASS (no manipulation)
Cross-asset duplicate	PASS (no match in DB)
Cross-campaign duplicate	PASS (no match in 12-month history)
AI photogrammetry area	102.3 sq ft (claimed: 100 sq ft)
Creative match	PASS (matches FMCG-2026-A variant 96%)
Owner consent OTP	PASS (OTP verified to +91-9X-X-X-456)
Final verification status	VERIFIED
Audit-grade evidence pack	Retained until 2033-05-17

What a CMO actually wants the report to answer in 2026

Coverage questions

What was completed across the campaign? · Where was it completed (per city, per zone, per pincode)? · Which planned assets remain pending or missed? · Is coverage balanced or concentrated?

Verification questions

Was each asset GPS-verified within geofence? · Was each photo captured live, not from gallery? · Was each submission timestamp-verified? · Was each field worker face-matched at submission?

Fraud questions

Were any duplicate submissions detected and removed? · Were any mock-location attempts caught? · Were any edited or AI-generated images flagged? · Were any cross-campaign photo re-uses identified?

Performance questions

Which city performed best per cost and per coverage? · Which vendor performed best / worst? · Where is visibility retention strongest? · Which zones underperformed and why?

Financial questions

What percentage of total billing is independently verified? · What is the unverified spend exposure? · What is the RoVE (Return on Verified Execution)? · Can this report defend procurement audit + BRSR Core assurance?

Audit committee questions

Is the evidence chain traceable end-to-end? · Are all underlying records retained for 7 years? · Has the report been independently verified? · Are anomalies flagged and reconciled?

Move from PPT reports to audit-grade verified evidence

Free 30-Day Verification Challenge on one live campaign. Per-asset evidence chain, 9-layer mock-location detection, AI image authentication, server-side timestamp, identity-verified field force, continuous audit trail, system-generated reports. Audit-grade evidence pack for CMO, audit committee, BRSR Core assurance, and CFO procurement review. 100% verification accuracy. 100% fraud detection rate.

Request a tamper-proof reporting pilot →

Anatomy of a tamper-proof CMO report: section-by-section

Report section	What it contains
Executive Summary	VER, VAR, VRS, RoVE per city + network composite
Campaign Health Score	Single composite (0-100) summarising all verification layers
Coverage Section	Verified asset count by city, zone, pincode; coverage heatmap; per-zone density
Verification Section	Per-asset breakdown of geofence + timestamp + identity + photo authenticity rates
Fraud Detection Section	Mock-location flags, duplicate detection, edit-signature catches, cross-campaign re-use
Per-vendor Scorecard Section	Tier A+ to D classification, per-vendor VER, drive-by rates, renewal recommendation
Lifecycle Section (for long campaigns)	Day 30 / 60 / 90 visibility retention audits
Financial Defensibility Section	Total invoice, verified billing %, unverified hold, RoVE calculation, PBP score
Audit Trail Appendix	End-to-end evidence chain per asset (server timestamps, hashes, identity records)
BRSR Core / ESG Disclosure Appendix	Auditor-ready evidence pack with API access
System-Generated Verification Certificate	"Verified by gOGig" stamp with cryptographic signature

Sample Campaign Health Score (network composite)

Component layer	Score	Weight
Geo-verification rate	97.7%	15%
Photo authenticity rate	99.4%	15%
Identity verification rate	98.6%	10%
Verified Execution Rate (VER)	93.9%	15%
Verified Area Rate (VAR)	93.7%	10%
Visibility retention (Day 90)	87.2%	15%
Creative compliance rate	96.0%	10%
Audit pass rate (10% random sample)	94.1%	10%
Composite Campaign Health Score	94.6 / 100	—

BRSR Core + audit assurance alignment

BRSR Core / auditor expectation	How tamper-proof FEI report satisfies it
Data traceable to source records	Every report number links to per-asset audit trail
Independently verifiable using recognised standards	9-layer mock-location + SHA-256 + perceptual hash + face-match are recognised technical standards
Measured consistently across periods	Same verification engine runs across all campaigns; methodology consistency
Clear data ownership across functions	Identity-verified submission + chain of custody documents ownership
Complete documentation	Per-asset 22-field evidence pack retained 7 years
Auditor-grade evidence chain	End-to-end from task creation through verified submission to system-generated report
Reasonable assurance support	API access for assurance providers (BSI, KPMG, EY, PwC, DNV)
Top 250 → top 1,000 readiness by FY 2026-27	Designed for audit-grade marketing spend disclosure
Value chain ESG disclosure (FY 2025-26)	Per-vendor scorecard supports value chain partner reporting
2-year minimum retention (often 7-year)	Default 7-year structured retention

Tamper-proof vs tamper-evident vs blockchain-anchored

Approach	What it guarantees	2026 maturity in India BTL
Tamper-permissive (PPT, Excel)	None	Default in legacy operations
Tamper-resistant (locked PDF, signed reports)	Harder to edit; not impossible	Common; meets boardroom but not auditor bar
Tamper-evident (SHA-256 + perceptual hash + edit signature)	Modifications detected automatically; integrity verifiable	Best practice 2026; gOGig FEI standard
Tamper-proof (cryptographic chain + structured retention)	Modifications detected and provably attributed; audit-grade	Emerging in regulated sectors
Blockchain-anchored (distributed ledger)	External cryptographic proof of timestamp and integrity	Niche; used in supply chain provenance (Tech Mahindra + StaTwig vaccine ledger)

Verification ROI: from PPT reporting to audit-grade evidence

Annual marketing spend	Verification cost (gOGig)	Avg leakage prevented	Audit-grade benefit
₹5 Cr (mid-size brand)	₹6-12 L	₹40-90 L	BRSR Core ready
₹15 Cr	₹15-28 L	₹1.2-2.5 Cr	BRSR Core + CFO procurement ready
₹50 Cr (large national)	₹40-75 L	₹4-8 Cr	BRSR Core + audit committee defensible
₹150 Cr (national + regional)	₹1.2-2.2 Cr	₹10-22 Cr	BRSR Core + ESG disclosure + investor relations
₹500 Cr+ (enterprise FMCG / paint / cement)	₹4-8 Cr	₹35-75 Cr	Top 250 BRSR Core mandatory readiness

Manual report vs gOGig tamper-proof report

Dimension	Manual PPT / PDF report	gOGig tamper-proof report
Evidence coverage	3-8% sample	100% of submissions
Modification detection	None	100% (SHA-256 + audit trail)
Photo authenticity verification	~3% manual review	100% AI
Geo-verification	~78%	100% (9-layer)
Server-side timestamp authenticity	None	100%
Identity-verified submission	~5%	100% (face-match + Aadhaar)
Cross-campaign duplicate detection	~0%	100% (12-month hash history)
Edit / AI-image detection	~0%	100%
End-to-end evidence chain	Manual reconstruction (weeks)	API-accessible (seconds)
Audit committee defensibility	Low	High
BRSR Core assurance readiness	Manual exercise	API-ready
Retention	Manual folders	7-year structured immutable retention
Time to produce report	2-6 weeks manual	Real-time, on-demand
Year-1 ROI	Baseline	5-15x

The most important question a CMO faces in 2026 is no longer "can you show me the report?". It is "can you prove that every number, image, location, and completion claim inside the report is authentic, traceable, and survives independent audit?". The PPT meets the meeting. The evidence chain meets the auditor.

What the best CMOs require in 2026 campaign reporting contracts

✓

Per-asset unique ID with locked task assignment

✓

9-layer mock-location detection on every GPS

✓

Server-side timestamp on every submission

✓

Live-capture photo enforcement (gallery disabled at app level)

✓

SHA-256 + perceptual hash on every photo

✓

Edit-signature detection + AI-generated image detection

✓

Face-match + Aadhaar identity at field worker login

✓

EXIF metadata preservation across submission pipeline

✓

Continuous audit trail with who/what/when on every event

✓

Evidence chain of custody from creation to report inclusion

✓

AI fraud detection on 100% of submissions

✓

System-generated reports without manual transcription

✓

Campaign Health Score with verification weights disclosed

✓

Live dashboard reference URLs embedded in static report

✓

7-year structured retention with API access for auditors

✓

BRSR Core / ESG-ready evidence pack

✓

Cross-campaign duplicate detection against 12-month hash history

✓

Independent third-party assurance compatibility (KPMG, EY, PwC, DNV, BSI)

✓

"Verified by gOGig" certification with cryptographic signature

FAQ

Frequently Asked Questions

Tamper-proof campaign reporting glossary

Tamper-proof campaign reportCMO / audit-grade report where every claim links to verifiable source evidence, every photo carries cryptographic fingerprint, every event is logged in audit trail, and end-to-end chain of custody is preserved.

Tamper-evidentRecords that cannot be silently altered; modifications are automatically detected through cryptographic fingerprinting.

Evidence chain of custodyEnd-to-end provenance metadata documenting how each piece of evidence was created, transformed, verified, and included in the report.

9-layer mock-location detectionGPS authenticity model catching location-spoofing apps. 100% detection rate.

Server-side timestampAuthoritative time captured by server, independent of device clock. Catches device-clock manipulation.

SHA-256 hash256-bit cryptographic fingerprint generated for every photo. Any alteration produces a different hash; tamper detection guaranteed.

Perceptual hashCV-based fingerprint catching near-duplicate images even after cropping, rotating, recoloring.

Edit-signature detectionCV model identifying Photoshopped, AI-generated, or otherwise manipulated images.

Live-capture validationPhoto must originate from camera at moment of capture; gallery uploads disabled at app level.

Face-match + Aadhaar identityField worker identity verified at app login against Aadhaar-validated photo. Catches substitute submission.

EXIF metadataPhoto metadata including capture time, GPS, device. Preserved across pipeline; stripped EXIF flagged as invalid.

Continuous audit trailImmutable log of every event (task creation, submission, verification, approval, modification) with who/what/when.

Reasonable assuranceHighest BRSR Core assurance level. Requires "sufficient and appropriate evidence" comparable to financial audit rigor.

BRSR CoreSEBI ESG framework. Mandatory reasonable assurance for top 250 (FY 2025-26) → top 1,000 (FY 2026-27).

Campaign Health ScoreComposite 0-100 score weighing 8 verification layers. Replaces "completion %" as headline KPI.

System-generated reportPDF / Excel / dashboard produced directly from verified data without manual transcription.

7-year structured retentionImmutable evidence storage with API access for auditors. Aligns with tax, statutory, insurance, BRSR Core retention needs.

Cross-campaign duplicate detectionImage hash matching against rolling 12-month historical database to catch photo re-use across campaigns.

Verified by gOGig certificationCryptographically signed verification stamp indicating evidence chain integrity.

RoVE (Return on Verified Execution)Revenue or brand-lift attribution / verified BTL spend. Replaces ROAS-alone for offline.

Field Execution Intelligence (FEI)The purpose-built software category for tamper-proof offline execution verification.

gOGig AI14 production models. 100% verification accuracy. 100% fraud detection rate.

Campaign types where tamper-proof reporting is now standard

gOGig's tamper-proof evidence chain applies across every offline execution format that must survive CMO, audit committee, and BRSR Core scrutiny.

Audit + assurance partner ecosystem

gOGig's tamper-proof evidence chain is built for read-only API review by independent assurance and audit providers conducting BRSR Core and procurement assurance.

KPMG India EY India PwC India Deloitte India BSI India DNV India SGS India TÜV India CRISIL ESG Ecodrisil Mahindra Sanyo (industry assurance)Independent assurance providers (top 500)

Move from PPT reports to audit-grade verified evidence

100%

AI accuracy

100%

Detection rate

5-15x

Year-1 ROI

Request a tamper-proof reporting pilot →Download the CMO report architecture template

How To

How to create a tamper-proof campaign report for your CMO

Use gOGig's 10-layer evidence architecture to turn a campaign report from a curated PPT into an audit-grade artifact whose every number, photo, and location survives BRSR Core assurance and audit-committee scrutiny.

Anchor every submission to place, time, and identity

Capture GPS verified against the locked target with 9-layer mock-location detection, a server-side timestamp independent of the device clock, and a face-match + Aadhaar identity check at field-worker login — so location, time, and who-submitted are all authentic at source.

Force live capture and cryptographically fingerprint every photo

Disable gallery uploads so photos come only from the camera, preserve EXIF, and generate a SHA-256 hash + perceptual hash + edit-signature on each image to catch duplicates, near-duplicates, Photoshopped, and AI-generated fakes.

Run AI fraud detection on 100% and log a continuous audit trail

Verify every submission (not a 5-8% sample) with the AI engine, and log every event — task assigned, submission created, verified, approved, modified — with who/what/when in an immutable sequence and full chain of custody.

Generate the report from verified data, never by hand

Produce the PDF, Excel, and dashboard directly from the verified data layer with no manual transcription, headlined by a disclosed-weight Campaign Health Score (0-100) instead of a self-reported completion %.

Retain for 7 years with auditor-grade API access

Store the per-asset evidence pack in immutable structured retention for at least 7 years and expose read-only API access so BRSR Core assurance providers (KPMG, EY, PwC, DNV, BSI) and CFO procurement can reconstruct any number end-to-end on demand.

Written by

gOGig Editorial

gOGig Editorial Team

The gOGig Editorial team publishes research, frameworks, and field intelligence drawn from gOGig Labs' dataset of 10,000+ verified field submissions across FMCG, dairy, OOH, BTL, pharma, security, telecom, and BFSI sectors.

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← Back to all posts

How do I create a tamper-proof campaign report for my CMO in 2026?

Why traditional campaign reports fail in 2026

What "tamper-proof" actually means in campaign reporting

The 10-layer architecture of a tamper-proof campaign report

The evidence chain of custody (how every report number is built)

Tamper-evident metadata captured per submission

What a CMO actually wants the report to answer in 2026

Anatomy of a tamper-proof CMO report: section-by-section

Sample Campaign Health Score (network composite)

BRSR Core + audit assurance alignment

Tamper-proof vs tamper-evident vs blockchain-anchored

Verification ROI: from PPT reporting to audit-grade evidence

Manual report vs gOGig tamper-proof report

What the best CMOs require in 2026 campaign reporting contracts

Frequently Asked Questions

How to create a tamper-proof campaign report for your CMO

gOGig Editorial

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