Entropy

NIST Beacon Observation

An independently verifiable temporal proof from an external entropy source.

Observation ID: 019fc8a4-ae16-777b-90ab-2a220dd580a9
Capture Method: Polling
Captured At: Aug 3, 2026, 5:21 PM UTC

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

{
  "block_id": "019fc8a5-8b3e-752e-b338-41395428f28a",
  "capture_method": "http_poll",
  "entropy": {
    "pulse": {
      "chainIndex": 2,
      "outputValue": "24F13FBB8446155F3816218A2994569E0AFCB805E2198BF5C2E2A18F59936C03AC6000FC33036D323E6CA081F26EE4F19957E906744604411937174A4E412C35",
      "pulseIndex": 1888197,
      "timeStamp": "2026-08-03T17:17:00.000Z",
      "version": "2.0"
    }
  },
  "entropy_hash": "2d22b596049086572395eea08e4dc37a6479ee27d62803a7c33656564e00dd5c",
  "id": "019fc8a4-ae16-777b-90ab-2a220dd580a9",
  "inserted_at": "2026-08-03T17:21:03.510508Z",
  "metadata": {},
  "metadata_hash": "5dd81d4309de99c9f8e70822e760f0eece8c33370ff5fb5da3af75bab0cbaab8",
  "observation_hash": "eb36894d7f415ff725022b8ab4218a4c710a3e35c95121810dff4d13eedd1662",
  "signature": "rSZEKZo90kNbwk/r3bSI7PMHz5Egm5bResAG5SZY3Scti365jvCo6feH0NvfGDrC6/x+lrOS73MkgvOkXCiDCw==",
  "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":"24F13FBB8446155F3816218A2994569E0AFCB805E2198BF5C2E2A18F59936C03AC6000FC33036D323E6CA081F26EE4F19957E906744604411937174A4E412C35","pulseIndex":1888197,"timeStamp":"2026-08-03T17:17:00.000Z","version":"2.0"}}

Entropy Hash

2d22b596049086572395eea08e4dc37a6479ee27d62803a7c33656564e00dd5c

Observation Hash

eb36894d7f415ff725022b8ab4218a4c710a3e35c95121810dff4d13eedd1662

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: 019fc8a4-ae16-777b-90ab-2a220dd580a9

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, 5:17 PM UTC

Timestamp in NIST pulse 1888197

Truestamp Capture Time

Aug 3, 2026, 5:21 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)

eb36894d7f415ff725022b8ab4218a4c710a3e35c95121810dff4d13eedd1662

Public Key (Base64 encoded)

1hHbF5H5u8LiSp+nVMRb8duR2eGkOo5Q1JYfcmAtF28=

Signature (Base64 encoded)

rSZEKZo90kNbwk/r3bSI7PMHz5Egm5bResAG5SZY3Scti365jvCo6feH0NvfGDrC6/x+lrOS73MkgvOkXCiDCw==

Verify Signature Manually

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