Entropy

NIST Beacon Observation

An independently verifiable temporal proof from an external entropy source.

Observation ID: 019fc909-50be-7610-80fb-77c2a0f53dc3
Capture Method: Polling
Captured At: Aug 3, 2026, 7:10 PM UTC

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

{
  "block_id": "019fc909-561d-7ede-89ce-f405bd82d524",
  "capture_method": "http_poll",
  "entropy": {
    "pulse": {
      "chainIndex": 2,
      "outputValue": "FE9458AD7DE2D5363D6097B5E2B71695A3C46FAEA5530CDA151B6C605D639FBBB59FC474179124AE03F9C0727FBB125B73D33C218CF9D4F5CAA066A6C07CDEAD",
      "pulseIndex": 1888307,
      "timeStamp": "2026-08-03T19:07:00.000Z",
      "version": "2.0"
    }
  },
  "entropy_hash": "dea6226993ff4750aa68c63f13f560868947d5942671ed24c4d1f34f21b0a4db",
  "id": "019fc909-50be-7610-80fb-77c2a0f53dc3",
  "inserted_at": "2026-08-03T19:10:58.750418Z",
  "metadata": {},
  "metadata_hash": "5dd81d4309de99c9f8e70822e760f0eece8c33370ff5fb5da3af75bab0cbaab8",
  "observation_hash": "12ec06ab0b90c492c1e1eda11192e1ace0ebc7e87b68eb9afbe289bee9d80660",
  "signature": "iRBHDJUTej+A0oD0UWWgseK0eSey7pTaEuZ/aRBkno//8PmrO1KILZ0/fDhTQXZatCV4O3LbJdQpkwDxZExlCg==",
  "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":"FE9458AD7DE2D5363D6097B5E2B71695A3C46FAEA5530CDA151B6C605D639FBBB59FC474179124AE03F9C0727FBB125B73D33C218CF9D4F5CAA066A6C07CDEAD","pulseIndex":1888307,"timeStamp":"2026-08-03T19:07:00.000Z","version":"2.0"}}

Entropy Hash

dea6226993ff4750aa68c63f13f560868947d5942671ed24c4d1f34f21b0a4db

Observation Hash

12ec06ab0b90c492c1e1eda11192e1ace0ebc7e87b68eb9afbe289bee9d80660

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: 019fc909-50be-7610-80fb-77c2a0f53dc3

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, 7:07 PM UTC

Timestamp in NIST pulse 1888307

Truestamp Capture Time

Aug 3, 2026, 7:10 PM UTC

Periodic capture via HTTP polling

Time Difference (Clock Delta)

3 minutes

Source timestamp was 3 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)

12ec06ab0b90c492c1e1eda11192e1ace0ebc7e87b68eb9afbe289bee9d80660

Public Key (Base64 encoded)

1hHbF5H5u8LiSp+nVMRb8duR2eGkOo5Q1JYfcmAtF28=

Signature (Base64 encoded)

iRBHDJUTej+A0oD0UWWgseK0eSey7pTaEuZ/aRBkno//8PmrO1KILZ0/fDhTQXZatCV4O3LbJdQpkwDxZExlCg==

Verify Signature Manually

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