{
  "height": 125,
  "block_hash": "8f9e912a576d3f116b620f96ad08ae6628e4e8dcea3deaebb8d4a60677a97736",
  "status": "confirmed",
  "bitcoin_block_height": 972999,
  "digest": {
    "alg": "sha256",
    "hex": "8f9e912a576d3f116b620f96ad08ae6628e4e8dcea3deaebb8d4a60677a97736",
    "preimage": "block:{\"at\":\"2026-10-25T00:04:07.037Z\",\"entry_count\":1,\"first_seq\":128,\"height\":125,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":128,\"merkle_root\":\"c0259bb32ee059e06e0eafe2f50c6c24c22e2b4d4bd90679755f15324b014372\",\"prev_hash\":\"a6f8eea00ae158e7759a2d3c4358fcadeac9ef62138db4318b783ef1e974de20\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:13:36.872Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add49b21b6f38d8222337759160244b9fd1e6ac5a69b8f58fec97d93141f9a846e4632d87771ef0b04385d9"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:13:36.872Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add49b173fe52c5feec8beca7c2b45176350fdf739207125e3b24b5189620ab2881bbeea5b640c36cd6d9f2"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:13:36.872Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add49b11163973feb1547ab67c3e3a90291d477cdd392cd4c9db23b7211d0d23eb92e67d628c75d0820ae5a"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/125/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."
}