{
      "name": "content-credential-verification",
      "domain": "Document & Content Provenance",
      "title": "C2PA Content Credential Verification (provenance integrity)",
      "description": "Validate a decoded C2PA manifest (art-123) then verify the Content Credential signature against a caller-supplied trust posture with zero network (art-124) then resolve the ingredient provenance tree and confirm it chains back (art-125). Client-side, zero-egress, agent-callable alternative to network-dependent trust-list validation.",
      "composer_url": "https://ainumbers.co/chaingraph/chains/content-credential-verification.html",
      "steps": [
        {
          "tool_id": "art-123-c2pa-manifest-validator",
          "handoff": "validated manifest structure feeds signature verification"
        },
        {
          "tool_id": "art-124-content-credential-signature-verifier",
          "handoff": "signature verdict feeds ingredient-tree resolution"
        },
        {
          "tool_id": "art-125-provenance-ingredient-tree-resolver",
          "handoff": "Exports provenance verdict with execution_hash — final stage"
        }
      ]
    }