{
  "height": 14,
  "block_hash": "9b52bcd6a4cc336eee737309332640a503f0e4cbc59b4a1e1c09ea8d39f33270",
  "status": "confirmed",
  "bitcoin_block_height": 972397,
  "digest": {
    "alg": "sha256",
    "hex": "9b52bcd6a4cc336eee737309332640a503f0e4cbc59b4a1e1c09ea8d39f33270",
    "preimage": "block:{\"at\":\"2026-10-21T00:10:40.941Z\",\"entry_count\":1,\"first_seq\":16,\"height\":14,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":16,\"merkle_root\":\"ea920809772f57581db8150048d020c554863eb26360261485047529dc252608\",\"prev_hash\":\"64a064e8c878c153c3c9c5c258d64cc5d10b42df1c7eadee427c5b309342b9c0\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-21T00:12:40.002Z",
      "updated_at": "2026-10-21T02:12:40.017Z",
      "bitcoin_block_height": 972397,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6ad8037947e57a0951754c9ff8d95b080ac4663f1d7c0b924d94930c3c4aad109570dacc756d144249e4f1b4"
        },
        {
          "type": "bitcoin",
          "block_height": 972397,
          "merkle_root": "3616ab4dc0b58b25a94f7d9d40129b90ea1bcd99284df921b12b1c2d41e1801b"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-21T00:12:40.002Z",
      "updated_at": "2026-10-21T02:12:40.017Z",
      "bitcoin_block_height": 972397,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6ad80378217a46e57e79861b0174904f7b29ff2d06c277ad350d3dc6363532747a76df3df5edcb930909ba90"
        },
        {
          "type": "bitcoin",
          "block_height": 972397,
          "merkle_root": "3616ab4dc0b58b25a94f7d9d40129b90ea1bcd99284df921b12b1c2d41e1801b"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-21T00:12:40.002Z",
      "updated_at": "2026-10-21T08:12:40.082Z",
      "bitcoin_block_height": 972434,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6ad8037802f09801591c1a960bb057617f1a53debd0eaabd92e8aca4bc5786facd47a282cf82072a1427a9a3"
        },
        {
          "type": "bitcoin",
          "block_height": 972434,
          "merkle_root": "4ba82ff779cc5b4117ce16930cb47c1d6948904befe83df35ac095b27e7dc347"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/14/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."
}