{
  "height": 122,
  "block_hash": "11c33ba0c1a04b815cf47abbdd9cfaa952f83a385d390bc8575964db872cf74c",
  "status": "confirmed",
  "bitcoin_block_height": 972993,
  "digest": {
    "alg": "sha256",
    "hex": "11c33ba0c1a04b815cf47abbdd9cfaa952f83a385d390bc8575964db872cf74c",
    "preimage": "block:{\"at\":\"2026-10-24T23:49:06.937Z\",\"entry_count\":1,\"first_seq\":125,\"height\":122,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":125,\"merkle_root\":\"a181aa2ef774916b1adb190871af86121dfecc2c63126e5ea24f8f4304569e49\",\"prev_hash\":\"62ec63c701a7e9aff47984249450c2d2acbb857a405d67cfdd4ff3a842a60a21\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T23:53:36.864Z",
      "updated_at": "2026-10-25T01:39:22.930Z",
      "bitcoin_block_height": 972993,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add4501042e87e73ec19efdb35da93ba8e3c8561537df13493bf1a113e83068cfdc257ed0cbd1db857b17d5"
        },
        {
          "type": "bitcoin",
          "block_height": 972993,
          "merkle_root": "38bdcfa6c75f0a225d7d4bec4e7744155441254baa8d040a293832c096def847"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T23:53:36.864Z",
      "updated_at": "2026-10-25T01:39:22.930Z",
      "bitcoin_block_height": 972993,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add4501e6eb9bfa887be801f48c71861a50e1ea9b95c7dd7a3e32a3df7f84e3319525e52c4c0625aa8dfd61"
        },
        {
          "type": "bitcoin",
          "block_height": 972993,
          "merkle_root": "38bdcfa6c75f0a225d7d4bec4e7744155441254baa8d040a293832c096def847"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T23:53:36.864Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add4502b89612fb1439692eee2164512a3885f17970f42239d9da6e419be3aca70693bda3921a6f4d2575b8"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/122/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."
}