{
  "height": 108,
  "block_hash": "0b0b98e4ff92398d2ca5fce64cb3f933f02ac512f79b4cf898966f0c4e47e070",
  "status": "confirmed",
  "bitcoin_block_height": 972988,
  "digest": {
    "alg": "sha256",
    "hex": "0b0b98e4ff92398d2ca5fce64cb3f933f02ac512f79b4cf898966f0c4e47e070",
    "preimage": "block:{\"at\":\"2026-10-24T22:34:19.221Z\",\"entry_count\":1,\"first_seq\":111,\"height\":108,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":111,\"merkle_root\":\"45d096aff6fdb9516e3641cf2621564eb82155aabfdc83216a7f0efed0b89658\",\"prev_hash\":\"9ff0995084a2bb881fa5bb6c9feec2b68c9410e8f3f55ba628728529cba5db39\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:38:37.669Z",
      "updated_at": "2026-10-25T00:31:17.450Z",
      "bitcoin_block_height": 972988,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add336fc7e8b61f5a6aa47d4e509b4a22c57270e03c9edf32e0a1d5bac1c19c80c6e31f59bdbdaadc505818"
        },
        {
          "type": "bitcoin",
          "block_height": 972988,
          "merkle_root": "3c587ddc5f28b4732a5eeb27216e13677e4348754375484a771cd576c6e70198"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:38:37.669Z",
      "updated_at": "2026-10-25T00:31:17.450Z",
      "bitcoin_block_height": 972988,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add336fd147db91664334cf8cc61c30602948c78e2844354adc4c145ed4f13653460b593375527cd80cfa8e"
        },
        {
          "type": "bitcoin",
          "block_height": 972988,
          "merkle_root": "3c587ddc5f28b4732a5eeb27216e13677e4348754375484a771cd576c6e70198"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:38:37.669Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add336fc0184acf9232a822987e769683510490529432d427ce0096d62effa7ab6febaf437114ffb2307b8b"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/108/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."
}