{
  "height": 149,
  "block_hash": "32b1730a19c336a4c14382cbc7aacbb6d32df262fdb97d13aaa9b97e9d5679c3",
  "status": "confirmed",
  "bitcoin_block_height": 973004,
  "digest": {
    "alg": "sha256",
    "hex": "32b1730a19c336a4c14382cbc7aacbb6d32df262fdb97d13aaa9b97e9d5679c3",
    "preimage": "block:{\"at\":\"2026-10-25T02:04:23.560Z\",\"entry_count\":2,\"first_seq\":169,\"height\":149,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":170,\"merkle_root\":\"dcea4a16765b21975e607bc505d1ea9a105c33e977793bfa017c006ba2dd9c16\",\"prev_hash\":\"dcae96ce5739232e9ae4a93867110dab6c4151fafda4162e02657c5ef36d48c3\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T02:08:52.920Z",
      "updated_at": "2026-10-25T04:28:50.521Z",
      "bitcoin_block_height": 973004,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add64b6b2e1418b89a56418c4a792b58c2f635903a5762275ebc57fc28e4e2fd032b014671bdf6270fd1203"
        },
        {
          "type": "bitcoin",
          "block_height": 973004,
          "merkle_root": "4a3f7a119a1ebb4b77ec97b4cda3bf4150b676bf9ce4334749bfe6839309701d"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T02:08:52.920Z",
      "updated_at": "2026-10-25T04:28:50.521Z",
      "bitcoin_block_height": 973004,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add64b6f9428cd8519834481073cb6d5eb9a39da040060e9eeb057423361ae1e44f18000cb2ecf38d23e1e9"
        },
        {
          "type": "bitcoin",
          "block_height": 973004,
          "merkle_root": "4a3f7a119a1ebb4b77ec97b4cda3bf4150b676bf9ce4334749bfe6839309701d"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-10-25T02:08:52.920Z",
      "updated_at": "2026-10-25T02:08:52.920Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add64b655b632316a7535cc61fb0299567e623de166d919c4e4a3d3e5ef01cb8718cb69fadb8ea71f0a62b0"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/149/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."
}