{
  "height": 162,
  "block_hash": "74bc50bb848641d6193ab6681f0e9b90c3f972bcee0cb953929b45b58d4634fc",
  "status": "confirmed",
  "bitcoin_block_height": 973010,
  "digest": {
    "alg": "sha256",
    "hex": "74bc50bb848641d6193ab6681f0e9b90c3f972bcee0cb953929b45b58d4634fc",
    "preimage": "block:{\"at\":\"2026-10-25T03:09:47.676Z\",\"entry_count\":2,\"first_seq\":196,\"height\":162,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":197,\"merkle_root\":\"39680a548af92ba1eff995e90c253b708cd22f2e890541f11fd217df96ee5b7c\",\"prev_hash\":\"d021d0ab6aee0985881e10b41cad9d9ba456ffecb8c8ed0b72e2a483fa54119d\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T03:13:01.807Z",
      "updated_at": "2026-10-25T04:18:50.520Z",
      "bitcoin_block_height": 973010,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add73bef937b68609729ba6082a07d87005a5df2351469c43dab37b5d774ad4502b0565be393407fb55e020"
        },
        {
          "type": "bitcoin",
          "block_height": 973010,
          "merkle_root": "dc04a7fb9aea89a51c41e84f6a61d3a360a4067d8910d5945ceb0b4d85cd2229"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T03:13:01.807Z",
      "updated_at": "2026-10-25T04:18:50.520Z",
      "bitcoin_block_height": 973010,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add73becebfce554243d09b16f0ce1a626717121378d66939e69deec38eb5773a811aa8e1ad5e5e12f5c01a"
        },
        {
          "type": "bitcoin",
          "block_height": 973010,
          "merkle_root": "dc04a7fb9aea89a51c41e84f6a61d3a360a4067d8910d5945ceb0b4d85cd2229"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-10-25T03:13:01.807Z",
      "updated_at": "2026-10-25T03:13:01.807Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add73bec9ccabecdd85ec51107bd8ed575862c34f05ad89ab0f1c60d0b54f279e6617775ba78fec755af163"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/162/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."
}