{
      "name": "agent-identity-verification",
      "domain": "AI & Agent Governance",
      "title": "Agent Identity Verification (RFC 9421 Web Bot Auth)",
      "description": "Reconstruct the RFC 9421 signature base and verify the Ed25519 Web Bot Auth signature against a caller-supplied public key (art-129) then validate the /.well-known/http-message-signatures-directory JWKS and keyid resolution (art-130) then validate the Signature Agent Card against the directory and emit an identity-trust verdict (art-131). Agent verifies agent, zero network, no human.",
      "composer_url": "https://ainumbers.co/chaingraph/chains/agent-identity-verification.html",
      "steps": [
        {
          "tool_id": "art-129-webbotauth-signature-verifier",
          "handoff": "Signature verdict feeds directory validation"
        },
        {
          "tool_id": "art-130-signature-directory-validator",
          "handoff": "Directory validation feeds agent card check"
        },
        {
          "tool_id": "art-131-signature-agent-card-validator",
          "handoff": "Exports identity-trust verdict with execution_hash — final stage"
        }
      ]
    }