{
  "issuer": "Demonstration issuer (demonstration, synthetic data)",
  "evidence_mark": "Sealed to the FusionTrace Evidence Standard",
  "demonstration": true,
  "fingerprint_method": "SHA-256 of the public_key value exactly as shown here and in each package's manifest.json",
  "key_id_method": "key_id is the first 16 hexadecimal characters of fingerprint_sha256. A package sealed before the one public seal may carry legacy_key_id instead: the first 16 hexadecimal characters of the SHA-256 of the decoded key bytes.",
  "retention": "A key is never removed from this list. A retired key stays listed, so every package signed with it still checks.",
  "keys": [
    {
      "key_version": "FT-DEMO-2026-10-V1",
      "algorithm": "Ed25519",
      "status": "demonstration",
      "public_key": "fln0kPATeBa/bqUBBMxi9Yl51mo7V4cQtRopIIlP5w4=",
      "fingerprint_sha256": "57ebfd2a0ffb05ee5b6ddf11a164da85e30e6047f489b732886bfe26fc04cb76",
      "key_id": "57ebfd2a0ffb05ee",
      "legacy_key_id": "8568d7d0398efc38"
    },
    {
      "key_version": "FT-DEMO-2026-10-V2",
      "algorithm": "Ed25519",
      "status": "demonstration",
      "public_key": "MCowBQYDK2VwAyEA2sjBmogM4rbeyHUA/A5OdueMkWjUSOeeumBZCBaHOWg=",
      "fingerprint_sha256": "fbc6d0b7c3e578001f4fdd8e3c7d057a390441eecebffdd68f19a0f0c372e833",
      "key_id": "fbc6d0b7c3e57800"
    },
    {
      "key_version": "FT-DEMO-2026-10-V3",
      "algorithm": "Ed25519",
      "status": "demonstration",
      "public_key": "JuWZukEYcusJAcj9DQWQ8zQes2fFfjQNvXUiWaJxv8Y=",
      "fingerprint_sha256": "d8b93c3808c8c21ada3fc2ad6ca7dd3a788892d1134f2aa4d6515cff2886e171",
      "key_id": "d8b93c3808c8c21a"
    }
  ]
}