{
  "schema": "sellat-proof/2",
  "proof_id": "9276ef9c-4d2b-4353-b464-68d1624e3cb4",
  "content": {
    "algorithm": "SHA-256",
    "hash": "27524c9669b7ee9773af7a95fdd3369a6708c861ef044d68430e81ae09fa8306"
  },
  "leaf": {
    "formula": "SHA-256('sellat-leaf:v2:' + proof_id + ':' + content.hash)",
    "value": "17076535e17054ae54f979c510a0a9125725abb43eafbc1c12d2e713916917ec"
  },
  "merkle": {
    "index": 0,
    "path": [],
    "root": "17076535e17054ae54f979c510a0a9125725abb43eafbc1c12d2e713916917ec"
  },
  "anchors": [
    {
      "chain_id": 137,
      "network": "Polygon Mainnet",
      "tx_hash": "0xfea0407cb0e0762530a204e9ff1102df1a48d4a7952fb9f5a4a4fd63e8b68345",
      "block_number": 93779656,
      "block_hash": "0x7ee48867ca8d251f92ba356227ee8c1b10a1445a9ce9a8a9cae418d80d666f48",
      "block_timestamp": "2026-09-14T08:28:37.000Z",
      "payload": "sellat:v2:17076535e17054ae54f979c510a0a9125725abb43eafbc1c12d2e713916917ec"
    }
  ],
  "attestations": [
    {
      "type": "opentimestamps",
      "state": "upgraded",
      "bitcoin_block_height": 966942,
      "target_digest": "17076535e17054ae54f979c510a0a9125725abb43eafbc1c12d2e713916917ec",
      "ots_base64": "AE9wZW5UaW1lc3RhbXBzAABQcm9vZgC/ieLohOiSlAEIFwdlNeFwVK5U+XnFEKCpElclq7Q+r7wcEtLnE5FpF+zwEMDzWNFmDeUcOFe9sh64Dp0I//AI/8i8/k7HRXUI8BBgsgAM2YElySVVmCNcXhLgCPAgL8r7NUnfF5uecNFAh27q4LDR3jQlYTR4WNlukLJcZfoI8CDbmQStPVI9Z4YKh7NrEWSrsikQRjwjJiRBwPK5iBZDQwjxBGqnsDLwCPe5spyAf1+q/wCD3+MNLvkMji4taHR0cHM6Ly9hbGljZS5idGMuY2FsZW5kYXIub3BlbnRpbWVzdGFtcHMub3JnCPEg/oNEZbYPk5hSsPEmirMfdE6ZRB70WSIFPFadtARNiocI8SBMyNC0ilQxbCtJIsIwSs0LrXTAcPUkFVkil8He+Fs4ZwjxIJE/atrIl8T3fK2wAlakXojD65Y6XCe54Ub6P5dNyKhcCPEgvQ3aOmKDocHmMMav3CJE1mWd3W6sIZRdGDNrSLoc1OwI8CD2B5BhDr5gv5wgatzDpTBnScd9kRt9jupZKc2N7rFJVgjxID5YCbHYmPn+QbrigGmMQ8Ft6DOhl/tij/C8xcIqKfzkCPAgI7JOZs5DqcxlZEKuvixoocY/Tti3uHA1Oz2a7Pq/ZzEI8CBSmo0TGzzS/EwxHckN3sz4yBWNpNz0Kd+0+YDNpcSpEgjxIJMOf3H3OU1EMsHan7q0qD7LUWcfW1ThRLycCVJFa2RkCPAgroQph6bEUzY/JnAbECSjnnvgBJ1CoopYgfcXXsWb1moI8SBa19v8G8xFPQi/XZg+O5la+9bAgc7HU1Oby2VD/tpvcwjwIBp58S5q+Lt3uj6fkCl3NjakBwR40l6w3+5nk2lAPHKVCPFZAQAAAAHK6AhoPn6slUb+YXCTrC+CEWLA5yfjyw8JLpmluNKQiAAAAAAA/v///wLgdgIAAAAAABYAFP9fiSAO7/hcw3x3h0X925fYa+CIAAAAAAAAAAAiaiDwBB3BDgAICPEgetFEVLdvplEGnBjDnMclgsqRt2l09V26WpaF13PAuosICPEgkCOoXrUeZs1BlmQIzygRSfwX63DOxgSR1bsHPVK6ErkICPAgOG2Eh8HuBcUZdfDI07Oz4iErWv1MPgRj0LHE9NEks4QICPEgl+PuDKS44gUl1SHrEz7venX2Jqx/7pkbQ5lNbzGw1DMICPAgk6wny95SGs/b8ZnQgMsKIN4vlO+YPQlS7NmcR47XaPYICPEg7TYoZHj/9ZcIusks4p3SOsuYVSRRxscKags+tiFaXk4ICPAg/LS0Z3mUpze0ksHvLR0mGlO6f/our+rqYrFmvVU2w8kICPAgztMYeB+gnhflsVRfn89viAQj8JYmWQ2ibbjfFtXdj4oICPAgYZE/GV07GARXeHXZBb79/y41TB0XkqBP7eSCueUlj+8ICPAgYbxE9Xu9yts6kXPHSciTDQGQmsQBV/Q03sHUQH2fQK0ICPEg0FgvFAbP8TRXfck+6LfvaR7PdUPfiu2SxIfoKdIq+4YICPAgQZYO8LIV1l9gdIm53OKvPTLSPlRwx4zy5Pd7tPwaeg0ICPAgMmkprRASracxaDFbwpdZ4W+zkbmhXvAHBKsum1zEGCoICAAFiJYNc9cZAQOegjv/8Ahsw9cKqmFWJwjwEOSWNZ7DlnOKYuaVaEFGXj0I8SCLZUWANqPop0re1O6E+LKoRwRyBQgBCRcLb993PIEqKAjwIEdaJBPmgPNGtmBukevqv0YfSAZcv/Wvzi1BLrdMDbHQCPEEaqewMvAISEfeiwKsa1cAg9/jDS75DI4sK2h0dHBzOi8vYm9iLmJ0Yy5jYWxlbmRhci5vcGVudGltZXN0YW1wcy5vcmf/8BBbS9oF4X1y5mXJeUaXr9O6CPEgbDmEvEX7f89DDinTtsJZz1SKatlIjDDSSybGwjCqb0MI8SDyE66RxDYdRdWmf9qVsgSqbcx+IcmPc7+ta2R07I/VTgjwIP+Gp2K+C9bAyHPZ+kH6JR+sKOeUAwTgWPxkBo4N2DcdCPEEaqewMfAIuITi74ihfAUAg9/jDS75DI4pKGh0dHBzOi8vZmlubmV5LmNhbGVuZGFyLmV0ZXJuaXR5d2FsbC5jb23wEMwhe/q9EjA4aQi8IxU5KTwI8SCLm0O3qBJ62Ae1YByRdrIw3uO5EmqV6tV1ccjhAvzzhQjxBGqnsDHwCGz4320tQzyjAIPf4w0u+QyOIyJodHRwczovL2J0Yy5jYWxlbmRhci5jYXRhbGxheHkuY29t",
      "note": "Standard OpenTimestamps file attesting the 32-byte digest equal to merkle.root; verify with OpenTimestamps tooling."
    },
    {
      "type": "rfc3161-qualified-timestamp",
      "state": "issued",
      "target": "content.hash",
      "target_digest": "27524c9669b7ee9773af7a95fdd3369a6708c861ef044d68430e81ae09fa8306",
      "gen_time": "2026-09-14T08:25:47.101Z",
      "serial_number": "0B59D38532AB7D856AA7AF8B8122FF51",
      "policy_oid": "0.4.0.2023.1.1",
      "tsa": "AUTORIDAD DE SELLADO DE TIEMPO FNMT-RCM-TSU 2025",
      "trusted_list": {
        "territory": "ES",
        "service": "Qualified timestamps issued by Autoridad de Sellado de Tiempo FNMT-RCM-TSU 2025",
        "tsu_cert_sha256": "56cab2cd977b47c14f0067d304b8554a0e31ba1d21b0f15bdf7faa819da03176"
      },
      "timestamp_response_der_base64": "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",
      "note": "RFC 3161 TimeStampResp over the SHA-256 of the file (content.hash), issued by a qualified TSA listed in the EU trusted list. Verify: openssl ts -verify -in <this>.tsr -data <file> -CAfile <trusted-list certificate> -partial_chain (the trusted list publishes the TSU certificate itself, not a CA)."
    }
  ],
  "times": {
    "sellat_received_at": "2026-09-14T08:25:40.233Z",
    "note": "block_timestamp is the independently verifiable time; sellat_received_at is SELLAT’s own record time"
  }
}