c2pa
signature
cose
ed25519
content-credentials
eu-ai-act
wave23

Content Credential Signature Verifier

Assess a C2PA COSE_Sign1 content-credential signature policy. The caller performs the signature check over the manifest bytes with the declared alg (Ed25519/ES256/ES384/PS256) and attests the outcome via the required signature_verified input; the kernel does not re-verify. Trust posture is caller-supplied: zero network, no OCSP. Emits ACCEPT or REFUSE.

Tool URL: https://ainumbers.co/chaingraph/art-124-content-credential-signature-verifier.html AP2/Policy Mandate export: yes

post/v1/tools/verify_content_credential_signature

Request

  • Base URL: https://ainumbers.co
  • URL: https://ainumbers.co/v1/tools/verify_content_credential_signature
  • Auth: none declared

Request body

alg'Ed25519' | 'ES256' | 'ES384' | 'PS256' required
signature_verifiedboolean required

result of the caller's signature check over the manifest bytes with the declared alg; the kernel does not re-verify

trust_anchor_matchboolean required
cert_not_expiredboolean
revocation_statusstring required

Response

Successful tool execution result

signature_verifiedboolean
signature_verification'caller_attested'
caveatsstring[]
chain_trustedboolean
algstring
alg_allowedboolean
verdict'ACCEPT' | 'REFUSE'

Changes

No recorded changes to this operation across all 1 revision of this API.