{
  "tool_id": "art-124-content-credential-signature-verifier",
  "kernel_id": "art-124-content-credential-signature-verifier",
  "display_name": "Content Credential Signature Verifier",
  "tool_version": "1.0.0",
  "mandate_type": "compliance_mandate",
  "purpose": "Verify the COSE_Sign1 claim signature against a caller-supplied signer public key using crypto.subtle.verify (Ed25519/ES256/ES384/PS256). Trust-anchor membership, cert validity window, and revocation status are caller-supplied policy inputs: zero network, no OCSP. Emits ACCEPT or REFUSE verdict.",
  "control_description": "Verify the COSE_Sign1 claim signature against a caller-supplied signer public key using crypto.subtle.verify (Ed25519/ES256/ES384/PS256). Trust-anchor membership, cert validity window, and revocation status are caller-supplied policy inputs: zero network, no OCSP. Emits ACCEPT or REFUSE verdict.",
  "declared_inputs": [
    "art-123-c2pa-manifest-validator"
  ],
  "declared_outputs": [
    "art-125-provenance-ingredient-tree-resolver"
  ],
  "kernel_digest": "sha256:141e6f335fbfd58ba9b12166c03841fc193eee0fcde37e4ac18b332055a9fed7",
  "trust_label": "deferred -- deterministic source published, zkVM proof not yet generated",
  "data_vintage": "2026-07-10",
  "last_validated": "2026-07-10",
  "conformance_fixtures_vendored": true,
  "compute_proof_ready": "ready",
  "wave": 23,
  "source_url": "https://ainumbers.co/chaingraph/art-124-content-credential-signature-verifier.html",
  "generated_at": "2026-07-25T20:02:55.601Z"
}