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C2PA
Verify a C2PA manifest
Paste a Trustvice C2PA 2.1 Content Credentials manifest (base64url COSE_Sign1). No Trustvice account required. A failed check is never shown as a pass.
Leave empty to check only the signature. If you paste a hash and it does not match the manifest instance_id, that is a fail, not a pass.
What this proves
The COSE_Sign1 verifies under a published Trustvice per-jurisdiction C2PA key.
When a content SHA-256 is supplied and matches, the manifest is vouching for those asset bytes.
Anyone can repeat this check with no Trustvice account. Unprovisioned signing keys do not block verify — verify only needs published public keys.
What this does not prove
That the asset bytes match when you did not supply a content SHA-256 — contentHashMatches is not a pass unless a comparison ran.
Full C2PA ingredient lineage, certificate expiry, or Adobe/CAI ecosystem acceptance beyond this Worker verdict.
Anything about Privacy receipts or AP2 mandates — those are separate public verbs, not this closer.
Déclarez les règles. Faites vérifier chaque exécution.
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