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  "issued_at": "2026-10-22T12:40:48.924106+00:00",
  "transfers": 0,
  "owner_kind": "person",
  "how_to_check": "Hash every file you were handed with sha256, list them as \"path sha256\" lines sorted by path, and hash that list: it must equal the folder fingerprint the owner shows you. Then fold the proof: side R means sha256(h || sibling), side L means sha256(sibling || h). The title leaf must fold to the Title root, and the root's leaf to the checkpoint tree head."
}