{
  "height": 23,
  "block_hash": "86179368de786069e73853562a18956f95a72bf87f662db1906fa86c5ab2235a",
  "status": "confirmed",
  "bitcoin_block_height": 972873,
  "digest": {
    "alg": "sha256",
    "hex": "86179368de786069e73853562a18956f95a72bf87f662db1906fa86c5ab2235a",
    "preimage": "block:{\"at\":\"2026-10-24T03:44:55.982Z\",\"entry_count\":1,\"first_seq\":25,\"height\":23,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":25,\"merkle_root\":\"e013bdc367ebb656c3a6cc6cbc0ef1f15121a40c6564ce44a630d567ec814c7b\",\"prev_hash\":\"b735d80077920c3affe2e0aa607b7bfe56c9e0c419516f4c7159cb4cc1d81ad5\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T03:53:42.393Z",
      "updated_at": "2026-10-24T05:53:42.416Z",
      "bitcoin_block_height": 972873,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6adc2bc69f93dc8c5e7c80a1b26c9dd1af73ba7909ad14c5dabd53ff54b22f4fed32d0db8842e78d6c67fe37"
        },
        {
          "type": "bitcoin",
          "block_height": 972873,
          "merkle_root": "90625906d9233b07692b176a16b5d11b1009eac87b2978f793dba69be8e83ec5"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T03:53:42.393Z",
      "updated_at": "2026-10-24T05:53:42.416Z",
      "bitcoin_block_height": 972874,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6adc2bc65038f68999820d50bc6677f6ec38f270d09ce1f930c52732daf4aa18eba6e375814bbad167f1eb49"
        },
        {
          "type": "bitcoin",
          "block_height": 972874,
          "merkle_root": "f22ea8a5f3bf05d2d8a064c1d5e33f38523361910c97dcf3695a2b0e6e9bb249"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T03:53:42.393Z",
      "updated_at": "2026-10-24T11:53:42.478Z",
      "bitcoin_block_height": 972911,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6adc2bc69d2abf24923cca1f6d27007421dc9a9f119b6ceff8d265cb3e08539fdcb691668d719ddca90bceb1"
        },
        {
          "type": "bitcoin",
          "block_height": 972911,
          "merkle_root": "af384043069b917afbadf259a575899e396392fd31d7a1ae89c5912c49549f08"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/23/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."
}