Entropy

NIST Beacon Observation

An independently verifiable temporal proof from an external entropy source.

Observation ID: 019fc902-1269-7947-833b-117965cc4b88
Capture Method: Polling
Captured At: Aug 3, 2026, 7:03 PM UTC

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

{
  "block_id": "019fc902-ed8a-76c2-aa3f-a963aa0f1840",
  "capture_method": "http_poll",
  "entropy": {
    "pulse": {
      "chainIndex": 2,
      "outputValue": "3549AE72CCF682F29B567A1BC52884BEEE73A363B1DB09CC03DFCA655AB33CF6D7360F6FD55FF1A1F6B8BA3CE45A568B3D52AE105C7E06D7B88866321DC9BEFA",
      "pulseIndex": 1888299,
      "timeStamp": "2026-08-03T18:59:00.000Z",
      "version": "2.0"
    }
  },
  "entropy_hash": "4d89e912a3460593114d93d7493e90ef0d5db98ab6d47fca9b69ed628aa752e6",
  "id": "019fc902-1269-7947-833b-117965cc4b88",
  "inserted_at": "2026-08-03T19:03:04.041639Z",
  "metadata": {},
  "metadata_hash": "5dd81d4309de99c9f8e70822e760f0eece8c33370ff5fb5da3af75bab0cbaab8",
  "observation_hash": "73c9367255ef7ff4da84b6aecca761a92c83374eefb23a37a65d1d5dc89a4e5a",
  "signature": "1MQ2lMnuJv+6x4PfWuVLROI9Q/+AWbYI4Va2+gK1bHpR/+Tfj8j0KWA5YO928lbx/ja8HyVisZCEqn2yq6DuAA==",
  "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":"3549AE72CCF682F29B567A1BC52884BEEE73A363B1DB09CC03DFCA655AB33CF6D7360F6FD55FF1A1F6B8BA3CE45A568B3D52AE105C7E06D7B88866321DC9BEFA","pulseIndex":1888299,"timeStamp":"2026-08-03T18:59:00.000Z","version":"2.0"}}

Entropy Hash

4d89e912a3460593114d93d7493e90ef0d5db98ab6d47fca9b69ed628aa752e6

Observation Hash

73c9367255ef7ff4da84b6aecca761a92c83374eefb23a37a65d1d5dc89a4e5a

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: 019fc902-1269-7947-833b-117965cc4b88

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, 6:59 PM UTC

Timestamp in NIST pulse 1888299

Truestamp Capture Time

Aug 3, 2026, 7:03 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)

73c9367255ef7ff4da84b6aecca761a92c83374eefb23a37a65d1d5dc89a4e5a

Public Key (Base64 encoded)

1hHbF5H5u8LiSp+nVMRb8duR2eGkOo5Q1JYfcmAtF28=

Signature (Base64 encoded)

1MQ2lMnuJv+6x4PfWuVLROI9Q/+AWbYI4Va2+gK1bHpR/+Tfj8j0KWA5YO928lbx/ja8HyVisZCEqn2yq6DuAA==

Verify Signature Manually

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