{
  "height": 84,
  "block_hash": "8e2d58deb8b900a38d5ae94368d0e29cf18e2c6332b0746b429f8c1dcccbf5c3",
  "status": "confirmed",
  "bitcoin_block_height": 972975,
  "digest": {
    "alg": "sha256",
    "hex": "8e2d58deb8b900a38d5ae94368d0e29cf18e2c6332b0746b429f8c1dcccbf5c3",
    "preimage": "block:{\"at\":\"2026-10-24T20:31:19.184Z\",\"entry_count\":1,\"first_seq\":87,\"height\":84,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":87,\"merkle_root\":\"cabef8b0f9a0465a0a404f59bee1f19e1fd1f359e87ccfdc48f6459037889c11\",\"prev_hash\":\"d9f9eaab1130348c3556de5c21f997377ccccffae4f5d87fca13fe5e37454e9f\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T20:37:18.990Z",
      "updated_at": "2026-10-24T22:09:18.887Z",
      "bitcoin_block_height": 972975,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add17002a3aee28fe4638243230aa987e36357813872218403e78a5a2dcb8ad8ebaea2befe3c8fb7e65bd02"
        },
        {
          "type": "bitcoin",
          "block_height": 972975,
          "merkle_root": "3eb48eb29389e740eedc53d9738b2325fddc7d0d93043c3050a541b5428ef537"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T20:37:18.990Z",
      "updated_at": "2026-10-24T22:09:18.887Z",
      "bitcoin_block_height": 972975,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add16ff8251da406fe750019c3d65f94baaef03d52edfa66bdf720be57d22afa29d6c6964504c1decbef947"
        },
        {
          "type": "bitcoin",
          "block_height": 972975,
          "merkle_root": "3eb48eb29389e740eedc53d9738b2325fddc7d0d93043c3050a541b5428ef537"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T20:37:18.990Z",
      "updated_at": "2026-10-25T02:49:17.524Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add16ff8e913f44c7a6d032cb1752ec196413ccfffba03eb36cdba20f21cfc17501d03c76c2a85c6710215a"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/84/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."
}