{
  "height": 171,
  "block_hash": "dd368f805486942b89ef6c1f1d2af8c59bad3d5aa00ea966161bcc48142b8ae3",
  "status": "pending",
  "bitcoin_block_height": null,
  "digest": {
    "alg": "sha256",
    "hex": "dd368f805486942b89ef6c1f1d2af8c59bad3d5aa00ea966161bcc48142b8ae3",
    "preimage": "block:{\"at\":\"2026-10-25T03:59:21.303Z\",\"entry_count\":2,\"first_seq\":214,\"height\":171,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":215,\"merkle_root\":\"6b50f47c429cdb382d05b453ef1cd028c0a5e13673f52e12c331de35fbce0960\",\"prev_hash\":\"88593add7819f3e63adf7a4df480b4fc64cf9fa089a298cf7146b48ff378fe5f\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "pending",
      "submitted_at": "2026-10-25T04:08:50.519Z",
      "updated_at": "2026-10-25T04:08:50.519Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add80d301080c30447a6b285ed34f8d64cddd019cca28509d7327db0e1c4f177f8404a525da5d979ea8a727"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "pending",
      "submitted_at": "2026-10-25T04:08:50.519Z",
      "updated_at": "2026-10-25T04:08:50.519Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add80d27b712d7bc55ebaa5160df2919b24feedd6562554f9c7989bf79172b7831eddb2cd7b9f0a9a8edfee"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-10-25T04:08:50.519Z",
      "updated_at": "2026-10-25T04:08:50.519Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add80d30bb8bd127056b2d78fac165650d412356432265988ae1ea258a9857869959d8e823f0857be1561b5"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/171/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."
}