{
  "height": 160,
  "block_hash": "3080bcbd8e46ad3697f472104680eb52bde998c62100d143b3630b4089a18895",
  "status": "confirmed",
  "bitcoin_block_height": 973009,
  "digest": {
    "alg": "sha256",
    "hex": "3080bcbd8e46ad3697f472104680eb52bde998c62100d143b3630b4089a18895",
    "preimage": "block:{\"at\":\"2026-10-25T03:00:02.583Z\",\"entry_count\":2,\"first_seq\":192,\"height\":160,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":193,\"merkle_root\":\"84123fb295234ab3d77c7ef0c4b4aa4ef6dfc8b73972fee82f0cfbde14d98d76\",\"prev_hash\":\"2f45028afc049438a46f1e9be5642f0b1de4325a5ba8e7e72142c369bb82429a\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T03:09:17.527Z",
      "updated_at": "2026-10-25T04:18:50.520Z",
      "bitcoin_block_height": 973009,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add72dec7cfacd55ae045c478176ec83ef39dc98b448d4b38fce0eae8134d00f7673165fb1dfe79902ee698"
        },
        {
          "type": "bitcoin",
          "block_height": 973009,
          "merkle_root": "141cf56f7b4558df3d03647f005a747090c85f503425d28edb46d7b28e45ce37"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T03:09:17.527Z",
      "updated_at": "2026-10-25T04:18:50.520Z",
      "bitcoin_block_height": 973009,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add72dd36447328c5ada181cfb06a4311e7c2a5e2d9c4461648f0b69916c6704ff113ebf4546e93a6a90f5d"
        },
        {
          "type": "bitcoin",
          "block_height": 973009,
          "merkle_root": "141cf56f7b4558df3d03647f005a747090c85f503425d28edb46d7b28e45ce37"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-10-25T03:09:17.527Z",
      "updated_at": "2026-10-25T03:09:17.527Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add72debf3f3efefaea493ddbdaf1726b055db577fee04f80e1275b4ef3e1646cc5f56b3b7d35a5dd894fbf"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/160/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."
}