{
  "height": 101,
  "block_hash": "837153e7d48fc6f51f8534b60b72b1ec1b023bac32b66f1627abc0b999442407",
  "status": "confirmed",
  "bitcoin_block_height": 972982,
  "digest": {
    "alg": "sha256",
    "hex": "837153e7d48fc6f51f8534b60b72b1ec1b023bac32b66f1627abc0b999442407",
    "preimage": "block:{\"at\":\"2026-10-24T21:57:52.599Z\",\"entry_count\":1,\"first_seq\":104,\"height\":101,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":104,\"merkle_root\":\"6534d3380c64ce8df24af55d92d3b45a10e97ed644c70a34eb292d437ce4c6ee\",\"prev_hash\":\"1131bc0c970ea2189fefa6384ac64838d5ce250c04887aa874ed9bb05d0ca698\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:07:22.443Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972982,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add2c1a80135599e1a03d337f606afa94603f15d39a4be6fa870621146ec0b7e83a43273dc77ff4a45ae0f1"
        },
        {
          "type": "bitcoin",
          "block_height": 972982,
          "merkle_root": "4c99dddccb05ff6394193624edeedc186bccaa073a9bcae6d83f1f485bcee966"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:07:22.443Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972982,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add2c1a86b9f2a307e3b5580ae88b415f0f70bc69f036f604c06a8d8d7dfb42f876b313bff439ee8d4dfcbf"
        },
        {
          "type": "bitcoin",
          "block_height": 972982,
          "merkle_root": "4c99dddccb05ff6394193624edeedc186bccaa073a9bcae6d83f1f485bcee966"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:07:22.443Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add2c1a0947f3b32ca8244846294e81c89cbce734dfddf4ddc4b3c30e6f6d9dd08fb65df836ca7524443338"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/101/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."
}