{
  "height": 113,
  "block_hash": "33ec762c5a8f0e6b1df4be8dc6587e0c65d2a247b4391ec8b40304cae98a1b16",
  "status": "confirmed",
  "bitcoin_block_height": 972988,
  "digest": {
    "alg": "sha256",
    "hex": "33ec762c5a8f0e6b1df4be8dc6587e0c65d2a247b4391ec8b40304cae98a1b16",
    "preimage": "block:{\"at\":\"2026-10-24T23:03:37.833Z\",\"entry_count\":1,\"first_seq\":116,\"height\":113,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":116,\"merkle_root\":\"458a516aff7c8d2ceafa792f77934ba1dbc6b3bcae9870e84d8eb46f273f572d\",\"prev_hash\":\"b40a4372d5b099f9c9db7685cc90156b0b9c49ddb6f0ce4edf13696a7545e974\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T23:08:07.675Z",
      "updated_at": "2026-10-25T00:13:36.872Z",
      "bitcoin_block_height": 972988,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add3a59af3645cef59cc8fe14c22ec5065a8bc2a149798015745f66db6305cc100d015f0135b28341f9b0bc"
        },
        {
          "type": "bitcoin",
          "block_height": 972988,
          "merkle_root": "3c587ddc5f28b4732a5eeb27216e13677e4348754375484a771cd576c6e70198"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T23:08:07.675Z",
      "updated_at": "2026-10-25T00:13:36.872Z",
      "bitcoin_block_height": 972988,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add3a591bdd60799e7e137a648dd9eb259ecf62f594466a479fa69fb9987f4b01ae45daf632068458e07f23"
        },
        {
          "type": "bitcoin",
          "block_height": 972988,
          "merkle_root": "3c587ddc5f28b4732a5eeb27216e13677e4348754375484a771cd576c6e70198"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T23:08:07.675Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add3a591b8c3db604ff74680a5a6ccbaec27feb0885514c68735fd0cf32efcfa03788227bca0fb95c923627"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/113/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."
}