{
      "name": "document-integrity-anchor",
      "domain": "Document & Content Provenance",
      "title": "Document Integrity & Timestamp Anchor (eIDAS Art.41 / RFC 3161)",
      "description": "Anchor document SHA-256 + claimed timestamp as an eIDAS Art.41-aligned electronic timestamp (art-121) → verify that the anchor recomputes correctly and all claims are internally consistent (art-122). W3C VC export via §13.11.",
      "composer_url": "https://ainumbers.co/chaingraph/chains/document-integrity-anchor.html",
      "steps": [
        {
          "tool_id": "art-121-document-integrity-anchor",
          "handoff": "document hash + timestamp anchor feeds attestation verification"
        },
        {
          "tool_id": "art-122-timestamp-attestation-verifier",
          "handoff": "Exports verified timestamp artifact with execution_hash — final stage"
        }
      ]
    }