Entropy

NIST Beacon Observation

An independently verifiable temporal proof from an external entropy source.

Observation ID: 019fc92d-f4a9-7732-9c43-4eb66a759331
Capture Method: Polling
Captured At: Aug 3, 2026, 7:51 PM UTC

Everything Truestamp records about this entropy observation, as a single canonical JSON object.

{
  "block_id": "019fc92d-f527-7fee-8f49-1a899dc28489",
  "capture_method": "http_poll",
  "entropy": {
    "pulse": {
      "chainIndex": 2,
      "outputValue": "6062C951511C0155456531C5FF9170EBA5B114B5BEDB921294A4F18C83131A126186660B43AE8196462B57793C989A09AA7EBC398E014230D298DB6AC01A8595",
      "pulseIndex": 1888347,
      "timeStamp": "2026-08-03T19:47:00.000Z",
      "version": "2.0"
    }
  },
  "entropy_hash": "affd82b2136a08b7c768f8ad7a9ed489c8f223e7d51d4150eadaff2e59cc2a70",
  "id": "019fc92d-f4a9-7732-9c43-4eb66a759331",
  "inserted_at": "2026-08-03T19:51:00.009503Z",
  "metadata": {},
  "metadata_hash": "5dd81d4309de99c9f8e70822e760f0eece8c33370ff5fb5da3af75bab0cbaab8",
  "observation_hash": "66d2eb798cd4c8a80bc67815df4f112c9404b0202c0ceb24ea32cd727d0d6040",
  "signature": "28leS/IIKxyqdPk8CENuBtKJhR3i43e+kiL24WErNKOiVmgmBew+7pLsAi3Yfgd4Cb/EvcX/Nb5wxdSCdbHeAA==",
  "signing_key_id": "3c19f776",
  "source": "entropy_nist",
  "state": "committed"
}

Observation

Verifiable entropy captured from an external public source. The canonical JSON representation and its hash are used as input to the blockchain's Merkle tree.

Entropy Canonical Pretty

{"pulse":{"chainIndex":2,"outputValue":"6062C951511C0155456531C5FF9170EBA5B114B5BEDB921294A4F18C83131A126186660B43AE8196462B57793C989A09AA7EBC398E014230D298DB6AC01A8595","pulseIndex":1888347,"timeStamp":"2026-08-03T19:47:00.000Z","version":"2.0"}}

Entropy Hash

affd82b2136a08b7c768f8ad7a9ed489c8f223e7d51d4150eadaff2e59cc2a70

Observation Hash

66d2eb798cd4c8a80bc67815df4f112c9404b0202c0ceb24ea32cd727d0d6040

SHA-256 composite hash binding the entropy data, metadata, and signing key id. This is the value placed as a leaf in the block's Merkle tree, and the value covered by the signature below.

Observation ID: 019fc92d-f4a9-7732-9c43-4eb66a759331

Time Delta

NIST Beacon pulses include a timestamp representing when the pulse was generated. Under normal operation, pulses are generated every 60 seconds. Large time differences indicate the beacon service may be offline or experiencing issues.

NIST Beacon Pulse Time

Aug 3, 2026, 7:47 PM UTC

Timestamp in NIST pulse 1888347

Truestamp Capture Time

Aug 3, 2026, 7:51 PM UTC

Periodic capture via HTTP polling

Time Difference (Clock Delta)

4 minutes

Source timestamp was 4 minutes behind capture time

Interpretation: A moderate delta (under 1 hour) may indicate temporary service delays or network issues.

Signature Verification

Truestamp signed this observation's hash at capture. Verify the signature in any Ed25519 verifier using the observation hash, public key, and signature shown below. The active public key is also published at https://www.truestamp.com/.well-known/keyring.json.

Algorithm

Ed25519

Message (Observation Hash, Hex encoded)

66d2eb798cd4c8a80bc67815df4f112c9404b0202c0ceb24ea32cd727d0d6040

Public Key (Base64 encoded)

1hHbF5H5u8LiSp+nVMRb8duR2eGkOo5Q1JYfcmAtF28=

Signature (Base64 encoded)

28leS/IIKxyqdPk8CENuBtKJhR3i43e+kiL24WErNKOiVmgmBew+7pLsAi3Yfgd4Cb/EvcX/Nb5wxdSCdbHeAA==

Verify Signature Manually

Opens an external Ed25519 verification tool with all fields pre-filled.