Entropy

NIST Beacon Observation

An independently verifiable temporal proof from an external entropy source.

Observation ID: 019fc90e-e4cf-743c-a201-67ed46e74065
Capture Method: Polling
Captured At: Aug 3, 2026, 7:17 PM UTC

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

{
  "block_id": "019fc90f-beac-7f87-abab-5abfda68005d",
  "capture_method": "http_poll",
  "entropy": {
    "pulse": {
      "chainIndex": 2,
      "outputValue": "5D32DA0ED563CC1311A26C9B044A8B2E70B4341DAA8269DF6FC11077D78D708B34507E985AF0C03973B883C8B7B282C45D533F06513758EF9D78508E0A0A1454",
      "pulseIndex": 1888313,
      "timeStamp": "2026-08-03T19:13:00.000Z",
      "version": "2.0"
    }
  },
  "entropy_hash": "e3a9bb3db9b8eb05d990d308c76944f703d7d570c5f33f4c3972d16d89b14327",
  "id": "019fc90e-e4cf-743c-a201-67ed46e74065",
  "inserted_at": "2026-08-03T19:17:04.335305Z",
  "metadata": {},
  "metadata_hash": "5dd81d4309de99c9f8e70822e760f0eece8c33370ff5fb5da3af75bab0cbaab8",
  "observation_hash": "a265ce17954c2dede7726442fd98c42f9a8d8ee7d57a109d87d0d1c0e9f0b8d9",
  "signature": "bo2XxEa58t/79IQtl/BZ28x1aRM/ByogVkd7uD8bM9h3S/s2SIr4+n6JqAMzaBtx9lsYifBM2KrU8YGO/+Y7BQ==",
  "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":"5D32DA0ED563CC1311A26C9B044A8B2E70B4341DAA8269DF6FC11077D78D708B34507E985AF0C03973B883C8B7B282C45D533F06513758EF9D78508E0A0A1454","pulseIndex":1888313,"timeStamp":"2026-08-03T19:13:00.000Z","version":"2.0"}}

Entropy Hash

e3a9bb3db9b8eb05d990d308c76944f703d7d570c5f33f4c3972d16d89b14327

Observation Hash

a265ce17954c2dede7726442fd98c42f9a8d8ee7d57a109d87d0d1c0e9f0b8d9

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: 019fc90e-e4cf-743c-a201-67ed46e74065

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, 7:13 PM UTC

Timestamp in NIST pulse 1888313

Truestamp Capture Time

Aug 3, 2026, 7:17 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)

a265ce17954c2dede7726442fd98c42f9a8d8ee7d57a109d87d0d1c0e9f0b8d9

Public Key (Base64 encoded)

1hHbF5H5u8LiSp+nVMRb8duR2eGkOo5Q1JYfcmAtF28=

Signature (Base64 encoded)

bo2XxEa58t/79IQtl/BZ28x1aRM/ByogVkd7uD8bM9h3S/s2SIr4+n6JqAMzaBtx9lsYifBM2KrU8YGO/+Y7BQ==

Verify Signature Manually

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