{
      "tool_id": "art-127-dual-layer-disclosure-verifier",
      "tool_version": "1.0.0",
      "display_name": "Dual-Layer Disclosure Verifier",
      "mcp_name": "verify_dual_layer_disclosure",
      "mandate_type": "compliance_mandate",
      "wave": 23,
      "gpu": false,
      "url": "https://ainumbers.co/chaingraph/art-127-dual-layer-disclosure-verifier.html",
      "description": "Confirm the EU Commission Code of Practice multi-layer requirement: both C2PA signed metadata and an imperceptible watermark (SynthID / Digimarc / TrustMark / c2pa.soft_binding) are declared present. Fails if only one layer present. Emits layers-present and missing-layer.",
      "input_schema_ref": "chaingraph/art-127-dual-layer-disclosure-verifier.html#manifest",
      "consumes": [
        "art-126-ai-act-art50-marking-checker"
      ],
      "feeds": [
        "art-128-content-binding-assertion-validator"
      ],
      "status": "live",
      "conformance_fixtures": true,
      "compute_capability": "server",
      "compute_images": [{"system":"sha256-source","image_id":"sha256:5562ad0d21f0602d5f812fea8b7149afe980514fd642b2231bfb9e48713486c2","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": "ABvC0Uk5MP1GsqmlRF55t4Ou1UQjPdYWIUw59guTL4MEoLAZTsK6l8x9NUSqezCncmyxZqY2YdS2GkvnSI7uiA/UgMWrdlOY/Rc9M7lzJ5ealTJZU1uFCySqxzW+G8rLHyK+sG2G5Wkh1oM16563zger6niiAmnbvexPivNrDL8jjhgTjbifTes6/nAJwoB17MY7etAnp5v7xgxYxsuITQepFmmD8FGc55IkSF9YAZTX7rw/XvOpwZ+T2YKMwm+iF2zwM+QdK3/yKE+y0XdFoZcJWHkU100h0f3Oryy+gaUd2UGDfnmSLsSoSRDRrZIFLSafGU5G1Y/xJr6dQtiTWQ==",
        "journal": {
          "chaingraph_version": "0.4.0",
          "kernel_digest": "sha256:c9ca46570b8c64af9de942c687e5470c2278eb0cab4e2c60a508e79da85e2870",
          "output": {}
        }
      },
      "export_capability": [
        "xlsx",
        "csv",
        "pdf",
        "xbrl:ocg-ext"
      ]
    }