{
  "height": 111,
  "block_hash": "f36a23b77b08f7aa1ae9326999ed9783d364f8545467e00ef17f98aa737a4da9",
  "status": "confirmed",
  "bitcoin_block_height": 972988,
  "digest": {
    "alg": "sha256",
    "hex": "f36a23b77b08f7aa1ae9326999ed9783d364f8545467e00ef17f98aa737a4da9",
    "preimage": "block:{\"at\":\"2026-10-24T22:53:52.744Z\",\"entry_count\":1,\"first_seq\":114,\"height\":111,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":114,\"merkle_root\":\"5db1352827986821da63c3f3945a98b795c86846b54b3e2c67146ea1d6addcca\",\"prev_hash\":\"c53c92b1eefe68cea152f3871ddba140a09f8303e8830b08cf2682e826b10fe6\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:58:07.672Z",
      "updated_at": "2026-10-25T00:03:36.869Z",
      "bitcoin_block_height": 972988,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add3801b5267ea298e9569face41ed7d00598ec1f543bf22ae5b459db4d2cfb0fdcd315228e54f73dbb59b8"
        },
        {
          "type": "bitcoin",
          "block_height": 972988,
          "merkle_root": "3c587ddc5f28b4732a5eeb27216e13677e4348754375484a771cd576c6e70198"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:58:07.672Z",
      "updated_at": "2026-10-25T00:03:36.869Z",
      "bitcoin_block_height": 972988,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add3801197bd90f908582798e06649e4dae3ea10f45a562fd822237580bf40dd7c21a96c3f387351fb73f08"
        },
        {
          "type": "bitcoin",
          "block_height": 972988,
          "merkle_root": "3c587ddc5f28b4732a5eeb27216e13677e4348754375484a771cd576c6e70198"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:58:07.672Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add3801ce1b2811d0a1706d636a61b17a94f4d23942b8a12dd7fff55edd69f318afaa7fea0349f05a6b2eb7"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/111/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."
}