{
      "tool_id": "art-129-webbotauth-signature-verifier",
      "tool_version": "1.0.0",
      "display_name": "Web Bot Auth Signature Verifier (RFC 9421)",
      "mcp_name": "verify_webbotauth_signature",
      "mandate_type": "compliance_mandate",
      "wave": 24,
      "gpu": false,
      "url": "https://ainumbers.co/chaingraph/art-129-webbotauth-signature-verifier.html",
      "description": "Reconstruct the RFC 9421 signature base and verify the Ed25519 Web Bot Auth signature against a caller-supplied public key, zero network. Checks alg=ed25519, tag=web-bot-auth, and freshness. Feeds the signatures-directory validator (art-130).",
      "input_schema_ref": "chaingraph/art-129-webbotauth-signature-verifier.html#manifest",
      "consumes": [],
      "feeds": [
        "art-130-signature-directory-validator"
      ],
      "status": "live",
      "conformance_fixtures": true,
      "compute_capability": "server",
      "compute_images": [{"system":"sha256-source","image_id":"sha256:540c9d7518ba023177cc5b43c463c8ae89c8fcedb57a44e4f007de93b891ebcf","valid_from":"2026-07-10"},{"system":"risc0","image_id":"sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6","valid_from":"2026-06-28"}],
      "compute_proof": {
        "type": "ZkVmReceipt",
        "system": "risc0",
        "receiptFormat": "groth16-bn254",
        "imageId": "sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6",
        "seal": "GZwA2glOJiysQVAFsk3ioizHBko9F3hY4mk/+t6x9pABZn6wbGaULZ1CXF88Eieh04qAIFffLMstHDEusaZWhwT4Yklth/y9XxxFRu4MbDkHyPLi49rlE2GBgpam8NaFJaQwZMZLPnfUhXrTd1ZMOOlE70b47+xaaH+uPWa6s5EY5c9Hr0c98+xtrAUa4fGFnb3MCSHJP4TC2hvbxQ1XzxIpJZWP+Sc5c+wrbaUgJOLJFjdSWofBegnSo18h3LfEJ88Pw/rp/aJGmhArKhgC64/kZS0KjUiATxSwoWjIskoB0zqm2RP51d+UpjslvfqPsNCvINWac/5YLz5wvQgUXg==",
        "journal": {
          "chaingraph_version": "0.4.0",
          "kernel_digest": "sha256:540c9d7518ba023177cc5b43c463c8ae89c8fcedb57a44e4f007de93b891ebcf",
          "output": {
            "alg_ok": true,
            "fresh": true,
            "signature_cryptographically_valid": true,
            "tag_ok": true,
            "verdict": "ACCEPT"
          }
        }
      },
      "export_capability": [
        "json",
        "vc"
      ]
    }