Entropy

NIST Beacon Observation

An independently verifiable temporal proof from an external entropy source.

Observation ID: 019fd6f7-68fb-7ff2-ace4-30ffd29290c4
Capture Method: Polling
Captured At: Aug 6, 2026, 12:06 PM UTC

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

{
  "block_id": "019fd6f8-3b23-7137-b4d6-6bd3ddd092d3",
  "capture_method": "http_poll",
  "entropy": {
    "pulse": {
      "chainIndex": 2,
      "outputValue": "4483F1D7FB88602A5FCAEF69C47B999D21D6B53010CFF738D0B18C1DB10FFC8DD99189A6D54CCF6F93BD9684E1F8B1EDF559C9519E7603BC64E15C71FE2D4C7E",
      "pulseIndex": 1892193,
      "timeStamp": "2026-08-06T12:02:00.000Z",
      "version": "2.0"
    }
  },
  "entropy_hash": "a1a7ca56ec86ae81a8a5ca2e01bb2628067e2cf2e7136173a4d1bed78f3275b2",
  "id": "019fd6f7-68fb-7ff2-ace4-30ffd29290c4",
  "inserted_at": "2026-08-06T12:06:06.332039Z",
  "metadata": {},
  "metadata_hash": "5dd81d4309de99c9f8e70822e760f0eece8c33370ff5fb5da3af75bab0cbaab8",
  "observation_hash": "01d6bde230821bfc46486f3fb59fb675fbf2b49375d5075fdfcf096b45d44d76",
  "signature": "s1lzbnoBtD0EDK+GGZsM+K5Ms58oznl5/j8viuvaNMd2gcmkBLJ0+4qyDC/8HF2m7VME/9j9dxX2uob1jWRnCg==",
  "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":"4483F1D7FB88602A5FCAEF69C47B999D21D6B53010CFF738D0B18C1DB10FFC8DD99189A6D54CCF6F93BD9684E1F8B1EDF559C9519E7603BC64E15C71FE2D4C7E","pulseIndex":1892193,"timeStamp":"2026-08-06T12:02:00.000Z","version":"2.0"}}

Entropy Hash

a1a7ca56ec86ae81a8a5ca2e01bb2628067e2cf2e7136173a4d1bed78f3275b2

Observation Hash

01d6bde230821bfc46486f3fb59fb675fbf2b49375d5075fdfcf096b45d44d76

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: 019fd6f7-68fb-7ff2-ace4-30ffd29290c4

Time Delta

NIST Beacon pulses include a timestamp representing when the pulse was generated. Pulses are generated every 60 seconds, and the beacon releases each one a few minutes after that timestamp, so a delta of several minutes is normal. A much larger delta means the value was already old when we captured it, which pins a submission window less tightly but does not make the observation any less valid.

NIST Beacon Pulse Time

Aug 6, 2026, 12:02 PM UTC

Timestamp in NIST pulse 1892193

Truestamp Capture Time

Aug 6, 2026, 12:06 PM UTC

Periodic capture via HTTP polling

Time Difference (Clock Delta)

4 minutes

Source timestamp was 4 minutes behind capture time

Interpretation: The interval between the time the source published this value and the time we captured it. This one is under 1 hour.

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)

01d6bde230821bfc46486f3fb59fb675fbf2b49375d5075fdfcf096b45d44d76

Public Key (Base64 encoded)

1hHbF5H5u8LiSp+nVMRb8duR2eGkOo5Q1JYfcmAtF28=

Signature (Base64 encoded)

s1lzbnoBtD0EDK+GGZsM+K5Ms58oznl5/j8viuvaNMd2gcmkBLJ0+4qyDC/8HF2m7VME/9j9dxX2uob1jWRnCg==

Verify Signature Manually

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