{
  "height": 129,
  "block_hash": "b70e13f54b344dffc85cc46a79341f7c5de00b35dda4da90b3cbfc766528c534",
  "status": "confirmed",
  "bitcoin_block_height": 972999,
  "digest": {
    "alg": "sha256",
    "hex": "b70e13f54b344dffc85cc46a79341f7c5de00b35dda4da90b3cbfc766528c534",
    "preimage": "block:{\"at\":\"2026-10-25T00:19:07.163Z\",\"entry_count\":1,\"first_seq\":132,\"height\":129,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":132,\"merkle_root\":\"40fa667769c9a8b3eab7ed9c6d9b2a79d6cd61464f2bd6c7ba97ffdc534988b8\",\"prev_hash\":\"e8dd2e00853a2cbb6762e07d445dc4d8dff82c3b75ab8b46d29076c4c5317ef1\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:23:36.876Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add4c0ac203d15c19cd3ea44658d909880e46664c13c28cb0cf9eece84bdc31fa09cb5287f393632d2a0204"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:23:36.876Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add4c0cb0c7efa8f925412a11d82145370b375aabf4afafdad85cc978229fc59a35a3a56d9fcca0c2c5b351"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:23:36.876Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add4c0bae3776cb7529ba5bc4145a6c6fcea9213edb4176f77229fbc44afe7dca9d4c5091167151af5ca20b"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/129/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."
}