{
  "height": 104,
  "block_hash": "79d30eb0c5d2315f9237183a6ea263628ad58394769776ff6fe1cbfdfc57ef90",
  "status": "confirmed",
  "bitcoin_block_height": 972983,
  "digest": {
    "alg": "sha256",
    "hex": "79d30eb0c5d2315f9237183a6ea263628ad58394769776ff6fe1cbfdfc57ef90",
    "preimage": "block:{\"at\":\"2026-10-24T22:14:18.982Z\",\"entry_count\":1,\"first_seq\":107,\"height\":104,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":107,\"merkle_root\":\"bdea4b2dfceffe9ad99a729fe0a1169037fda06c41b8edf36347307a14a9aeb3\",\"prev_hash\":\"fffc9781e955c8b673cf346c934efc3b04ab13178a6ab39b35e83573f829f17e\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:18:48.888Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972983,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add2ec9ec6693d5f88e94107829f186191e1532c165234780c68aeb05a232d6e358ad0cab00d4e6652e1bf1"
        },
        {
          "type": "bitcoin",
          "block_height": 972983,
          "merkle_root": "2d3b1cbbb9d475683c6d1c4ca9bae429ec9d29eb61ac98d26a0378253cebb06b"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:18:48.888Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972985,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add2ec93af8877a2347402ac1f65bd14a454a6f8fbb53ac432d7492aaa29ae684839405cf97b607cd015ffa"
        },
        {
          "type": "bitcoin",
          "block_height": 972985,
          "merkle_root": "af454fa7def8d620c0d2607c1feed6f4405130c7e8d2985c6b9410af08c6095e"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:18:48.888Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add2ec98f483cf0b10e4d63895dc88f6f9561f2b98dbdbe8312b7f771ae5c5cf0dee00400404edf464d4031"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/104/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."
}