{
  "tool_id": "art-209-nft-metadata-validator",
  "kernel_id": "art-209-nft-metadata-validator",
  "display_name": "NFT Metadata Validator",
  "tool_version": "1.0.0",
  "mandate_type": "compliance_mandate",
  "purpose": "Validates ERC-721/ERC-1155 and OpenSea NFT metadata JSON against required fields (name, description, image), recommended fields (external_url, animation_url, attributes), attribute entry structure, and license field presence. Schema check only; no on-chain calls. Not legal advice.",
  "control_description": "Validates ERC-721/ERC-1155 and OpenSea NFT metadata JSON against required fields (name, description, image), recommended fields (external_url, animation_url, attributes), attribute entry structure, and license field presence. Schema check only; no on-chain calls. Not legal advice.",
  "declared_inputs": [],
  "declared_outputs": [],
  "kernel_digest": "sha256:87972c28cc06505e0cac65a400724692a0ed5c42149e0beeae70c09629308792",
  "trust_label": "independently verified -- zkVM execution proof (risc0/groth16-bn254)",
  "data_vintage": "2026-07-10",
  "last_validated": "2026-07-10",
  "conformance_fixtures_vendored": true,
  "compute_proof_ready": "ready",
  "wave": 35,
  "source_url": "https://ainumbers.co/chaingraph/art-209-nft-metadata-validator.html",
  "generated_at": "2026-07-25T20:02:55.601Z"
}