{
  "height": 60,
  "block_hash": "1a5f5c4db5287fbbd07ded0e0a2d789f13a0971af5ee9ac0c6b2ce8345c33fc0",
  "status": "confirmed",
  "bitcoin_block_height": 972968,
  "digest": {
    "alg": "sha256",
    "hex": "1a5f5c4db5287fbbd07ded0e0a2d789f13a0971af5ee9ac0c6b2ce8345c33fc0",
    "preimage": "block:{\"at\":\"2026-10-24T18:31:02.824Z\",\"entry_count\":1,\"first_seq\":62,\"height\":60,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":62,\"merkle_root\":\"06e20d4f2230356dd8e262ce3ce1db5283d59ddab950c4baf291550cab966091\",\"prev_hash\":\"9cb08193b643cbc3c18f48adb35ef3dad3b8c035442d835ad89ae353b6b809ab\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T18:40:31.672Z",
      "updated_at": "2026-10-24T21:37:52.447Z",
      "bitcoin_block_height": 972968,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6adcfba00b4308e63249bea27718c9cd2fb77fb425c5c2e58cb5c6b9976a4181e881f6c1be0b299ea4fe1542"
        },
        {
          "type": "bitcoin",
          "block_height": 972968,
          "merkle_root": "2a0afd342bd007efb1fc07905f9b010bb0dbfc7c9b9c619cb1902d45b6d9cff3"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T18:40:31.672Z",
      "updated_at": "2026-10-24T21:37:52.447Z",
      "bitcoin_block_height": 972968,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6adcfb9ff33a569e7471d00b9e843a9fefebba5824570d7b8fec2f847cd28201045a5f14839be81e333bb25f"
        },
        {
          "type": "bitcoin",
          "block_height": 972968,
          "merkle_root": "2a0afd342bd007efb1fc07905f9b010bb0dbfc7c9b9c619cb1902d45b6d9cff3"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T18:40:31.672Z",
      "updated_at": "2026-10-25T02:49:17.524Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6adcfba0164e4637a90f5d01c5d4b3613a093be551ffa1f8542aad9fe58d3f965e96a18b121468f413063bd2"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/60/anchor.ots",
  "how_to_verify": "Download the .ots proof and run `ots verify -d <block_hash> <file>.ots` with the OpenTimestamps client, which checks the Bitcoin attestation against Bitcoin block headers. The digest is the block hash: sha256 of digest.preimage, the text \"block:\" followed by the canonical block header, which is the same header the issuer signs."
}