{
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  ],
  "did_intended": "did:web:csoai.org#board-attestation-1",
  "kind": "csoai.public-root/v1",
  "leaf_definition": "sha256(canonical(card minus sha256 and sig_ed25519)) — binds subject, source_urls, tags, as_of, did, surface, unmeasured and payload",
  "node_definition": "parent = sha256(left || right) over RAW 32-byte digests, pairwise, bottom-up. An odd node at any level is paired WITH ITSELF (Bitcoin-style duplication), not promoted. No domain-separation prefix.",
  "tree_caveat": "Odd-node duplication makes this tree shape collidable in the sense of CVE-2012-2459: appending duplicates of the tail can yield a DIFFERENT leaf set with an IDENTICAL merkle_root (the three-leaf set [A,B,C] and four-leaf set [A,B,C,C] are the minimal deterministic example). The ambiguity is closed ONLY because card_count is inside the signed preimage. Therefore a verifier MUST reject any presentation where len(card_sha256) != card_count, and MUST reject any inclusion proof with index >= card_count. Checking the merkle_root alone is NOT sufficient. A future v2 should move to RFC 6962 domain separation (0x00 leaf / 0x01 node), which removes the collision by construction; that changes every root, so it is not a silent upgrade.",
  "language": "coverage of public XRPL instruments + public notices. No bank names as clients. Not a certification.",
  "merkle_root": "94e99db52a67931aa38ca6b0aa4574c28a600204107b26ad3beef9b9e366e292",
  "note": "Envelope schema is public-root-v1, not a measurement card. This root.json envelope is Ed25519-signed over the compact preimage under did:web:csoai.org#board-attestation-1. Leaves MAY carry attestations — coverage harvest, not grades. Not MEASURED. Not a certificate. Free; not paywalled.",
  "schema": "https://councilof.ai/schema/public-root-v1.json",
  "sources": [
    "https://xrpl.fi/api/metrics"
  ],
  "xrpl_asset_count_attempted": 16,
  "xrpl_basket_merkle": "c558cbe482e80f041123c38fda62c7e54f5ae243e62c051348a90b532924a286",
  "xrpl_fi_assetCount": 16,
  "xrpl_fi_updatedAt": "2026-08-28T09:06:28.399Z",
  "sig_ed25519": "e127689a1d6a7db12cbe7c45469a7c1abb1081ebd4982b3be9e0ae4b217c7f70211240a54282fe1cd2c92e8b0f91a3f64aba486adcad12cdb07c61cafa01f609",
  "sig_preimage": "Ed25519 over canonical JSON of {kind, schema, as_of, merkle_root, card_count, did_intended} only. card_sha256[] is bound by merkle_root. PKCS8 stays on Pages (OIDC). Not a certificate."
}