{
  "height": 48,
  "block_hash": "9c7b8594dc5d394d23e2830f69c4d71dcafdb2731a4284495e5eb7b1fbbc0c89",
  "status": "confirmed",
  "bitcoin_block_height": 972955,
  "digest": {
    "alg": "sha256",
    "hex": "9c7b8594dc5d394d23e2830f69c4d71dcafdb2731a4284495e5eb7b1fbbc0c89",
    "preimage": "block:{\"at\":\"2026-10-24T17:31:01.924Z\",\"entry_count\":1,\"first_seq\":50,\"height\":48,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":50,\"merkle_root\":\"5f4ed213eec01d802178097c56cb73db2eb1577b7de3d1bedcae84d8d66c91b5\",\"prev_hash\":\"efb002fdee191599d5ce485eae5f00924bb351e060c5b06bde0c160dabdf6f3a\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T17:40:31.659Z",
      "updated_at": "2026-10-24T18:40:31.672Z",
      "bitcoin_block_height": 972955,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6adced9065e87d605875aeb23176f44a22fe908ae5ab5806beacbe46ee726a8601379c1dd7c2db08979ba229"
        },
        {
          "type": "bitcoin",
          "block_height": 972955,
          "merkle_root": "3070b4b64d766acc6b8c2ec362acc3415aa2e07e9a5bc2e992ccd9c676ae577b"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T17:40:31.659Z",
      "updated_at": "2026-10-24T18:40:31.672Z",
      "bitcoin_block_height": 972955,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6adced90f0ef8baed7b1ecf3094397e982783ef63ecc9ea11f222c5dcfa880aa616a169addb4da68d0e739b3"
        },
        {
          "type": "bitcoin",
          "block_height": 972955,
          "merkle_root": "3070b4b64d766acc6b8c2ec362acc3415aa2e07e9a5bc2e992ccd9c676ae577b"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T17:40:31.659Z",
      "updated_at": "2026-10-24T19:53:06.806Z",
      "bitcoin_block_height": 972959,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6adced907776f61f63c47e2c074d6c8f1fc4854d614d66fcb15f1d90607bb3bd2ea8a0de39dbe226612f34f1"
        },
        {
          "type": "bitcoin",
          "block_height": 972959,
          "merkle_root": "b24f80d7cd4c29a7c0218013b1bbb0a729ae2ef53b720f465ca9c5b104743f66"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/48/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."
}