{
  "height": 58,
  "block_hash": "179a86a5a202b84c1795fe439453608a3b7a609f23d2794feb1bfff1c6135cc3",
  "status": "confirmed",
  "bitcoin_block_height": 972968,
  "digest": {
    "alg": "sha256",
    "hex": "179a86a5a202b84c1795fe439453608a3b7a609f23d2794feb1bfff1c6135cc3",
    "preimage": "block:{\"at\":\"2026-10-24T18:21:02.115Z\",\"entry_count\":1,\"first_seq\":60,\"height\":58,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":60,\"merkle_root\":\"28a1f5accc3e6194a070e0aa642f479eaccce40145b07702212932f1445aa4a7\",\"prev_hash\":\"57b2b5ef096431cb0b6aef3823360fde45976b963c60df43427c0a59eb826b2d\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T18:30:31.668Z",
      "updated_at": "2026-10-24T21:37:52.447Z",
      "bitcoin_block_height": 972968,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6adcf94842192d4ff178178afc3881a2ab98833b2b25e4c93f7cdd35be7414d1f8af78cf4109c6494022ee48"
        },
        {
          "type": "bitcoin",
          "block_height": 972968,
          "merkle_root": "2a0afd342bd007efb1fc07905f9b010bb0dbfc7c9b9c619cb1902d45b6d9cff3"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T18:30:31.668Z",
      "updated_at": "2026-10-24T21:37:52.447Z",
      "bitcoin_block_height": 972968,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6adcf94836bad24bc7f46db614952a9e7ec886c2f3db46d9651ae3f36fca89a84847531a1e03f083ae153758"
        },
        {
          "type": "bitcoin",
          "block_height": 972968,
          "merkle_root": "2a0afd342bd007efb1fc07905f9b010bb0dbfc7c9b9c619cb1902d45b6d9cff3"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T18:30:31.668Z",
      "updated_at": "2026-10-25T02:49:17.524Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6adcf948080c458ad76db67e04a9faeb06644e0f4d30f188f80dd965ffd54db7d6373825e6dde51b0cf023e1"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/58/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."
}