CanonProof

The authenticity authority for digital evidence.

CanonProof is the neutral trust layer for the internet — cryptographically certifying files and exposing explainable forensic reasons behind every result.

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Neutral & Standards-driven Legal-grade Certificates API-first Explainable Forensics
Latest certificate
LIKELY_AUTHENTIC 
{
  "certificateId": "CP1-9QF2-7K2M-1A0X",
  "sha256": "e5c1…a4bd",
  "mediaType": "image/jpeg",
  "score": 92,
  "label": "LIKELY_AUTHENTIC",
  "confidence": 0.94,
  "verifyUrl": "/certificates/CP1-9QF2-7K2M-1A0X"
}
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4 labels
AUTHENTIC → MANIPULATED
API-first
REST + signed JWS payloads
SHA-256
cryptographic fingerprint + public verify
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Neutral Trust Authority

Standards-driven verification, ES256-signed certificates, public JWKS — the SSL-like layer for evidence authenticity.

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Explainable Forensics

Indicators for metadata, ELA, DCT/entropy, thumbnails, headers, and AI-likelihood — with human-readable reasons you can cite.

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Open Verification

Every certificate has a public verification URL and signed JWS payload for independent validation anywhere.

How CanonProof certifies authenticity

Upload & identify

Image, video, audio, or PDF. CanonProof hashes with SHA-256 and identifies media type.

Extract indicators

EXIF plausibility, thumbnail v. image pHash, ELA residuals, header heuristics, and AI-likelihood signals.

Score & label

Weighted scoring produces one of four labels with an overall confidence.

Sign & publish

Results are ES256-signed (JWS) and issued with a certificate ID and a public verification URL.

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Explainable reasons (example)

Human-readable lines that map indicators to the final label — built for filings, reports, and audits.

- img.exif.has_make_model: present
- img.thumb_mismatch: false
- img.ela.p95: 0.016 (low residuals)
- ai.likelihood: 0.11 (low)
→ LIKELY_AUTHENTIC (score 92, confidence 0.94)

Who relies on CanonProof

Newsrooms & Media
Pre-publication verification against manipulation and synthetic media.
Investigations
Tamper checks, provenance flags, and public verify links for reports.
Insurance & Legal
Fraud prevention, evidence integrity, and citation-ready certificates.

API-first by design

Embed CanonProof in your platform: POST /api/v1/verify → signed JWS, score, reasons, and a public verify URL.
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Bring trust back to digital evidence.

Issue your first CanonProof certificate in minutes.
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