{
  "height": 1,
  "block_hash": "2bf8af63a980ded3a44fa77dd742726b6506794e3207c447926fe4197c55ed06",
  "status": "confirmed",
  "bitcoin_block_height": 971434,
  "digest": {
    "alg": "sha256",
    "hex": "2bf8af63a980ded3a44fa77dd742726b6506794e3207c447926fe4197c55ed06",
    "preimage": "block:{\"at\":\"2026-10-14T16:09:35.374Z\",\"entry_count\":1,\"first_seq\":3,\"height\":1,\"key_id\":\"key_f6a85f595bce8b9f\",\"last_seq\":3,\"merkle_root\":\"60b823a671542c7c079c15fa546764af59d7b28edaad329bf3cf77795b9bfb8e\",\"prev_hash\":\"494d58d7579b574014f581b15f0be8238128f81676bea7929d3ced52d39f8143\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-14T16:15:05.276Z",
      "updated_at": "2026-10-14T18:36:05.912Z",
      "bitcoin_block_height": 971434,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6acfaa8a9943e3901163eab0ad872cbf9e3fcb242eeb10f05161f89cbf505cd628468ecfb43b42cb08ad24c2"
        },
        {
          "type": "bitcoin",
          "block_height": 971434,
          "merkle_root": "8b95567a5e7230bd3bb7b1231c50d8f5902bc8adbc2411a75a2da0a6f9f70e4a"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-14T16:15:05.276Z",
      "updated_at": "2026-10-14T18:36:05.912Z",
      "bitcoin_block_height": 971434,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6acfaa89f7cea819bb9151cd2637e1783e38926f6f269471bd49e6f85253c68a60cf33f13add80d270e173a9"
        },
        {
          "type": "bitcoin",
          "block_height": 971434,
          "merkle_root": "8b95567a5e7230bd3bb7b1231c50d8f5902bc8adbc2411a75a2da0a6f9f70e4a"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-14T16:15:05.276Z",
      "updated_at": "2026-10-14T20:36:05.992Z",
      "bitcoin_block_height": 971452,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6acfaa8a0827aa1a2d300a33111e4641796e4fb9619dc609c45af808a8ed8a8ccd1f5a1447de6f612bddf0e4"
        },
        {
          "type": "bitcoin",
          "block_height": 971452,
          "merkle_root": "bb16b9046e4f11363c79a8ab588f23385aefea305764a24e3c13b31fd109e672"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/1/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."
}