Entropy

NIST Beacon Observation

An independently verifiable temporal proof from an external entropy source.

Observation ID: 019fc8ef-c05b-7b36-93e2-3e4ea4a9fc37
Capture Method: Polling
Captured At: Aug 3, 2026, 6:43 PM UTC

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

{
  "block_id": "019fc8f0-9de8-72b9-ad52-292df44ffac6",
  "capture_method": "http_poll",
  "entropy": {
    "pulse": {
      "chainIndex": 2,
      "outputValue": "2C0B83F3C71399AA5AA9CA6564402B868565C21D46E91909E14F12A6C20E18D2E5A6B830ED067DD18BA718CEB52FAF1ED7D78DBD4B5812F41ACEDC6B8EDE1CD3",
      "pulseIndex": 1888279,
      "timeStamp": "2026-08-03T18:39:00.000Z",
      "version": "2.0"
    }
  },
  "entropy_hash": "2fdeaf48cca13e9c22ca9f6019542f7e4e9cc174bed63841302f862590c510a8",
  "id": "019fc8ef-c05b-7b36-93e2-3e4ea4a9fc37",
  "inserted_at": "2026-08-03T18:43:03.387740Z",
  "metadata": {},
  "metadata_hash": "5dd81d4309de99c9f8e70822e760f0eece8c33370ff5fb5da3af75bab0cbaab8",
  "observation_hash": "35b63390f2246051d86ea713596d84298c0e10cbd7f690687400cab2eb4d77ee",
  "signature": "YlFVyRZUjCb2qha4MkKXeoUL7hQ+keRxS4jaiP2MzE/T1D9BJwSXMCwkS1nwVnm9V5YKQxnYae2m6MWXu95pBw==",
  "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":"2C0B83F3C71399AA5AA9CA6564402B868565C21D46E91909E14F12A6C20E18D2E5A6B830ED067DD18BA718CEB52FAF1ED7D78DBD4B5812F41ACEDC6B8EDE1CD3","pulseIndex":1888279,"timeStamp":"2026-08-03T18:39:00.000Z","version":"2.0"}}

Entropy Hash

2fdeaf48cca13e9c22ca9f6019542f7e4e9cc174bed63841302f862590c510a8

Observation Hash

35b63390f2246051d86ea713596d84298c0e10cbd7f690687400cab2eb4d77ee

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: 019fc8ef-c05b-7b36-93e2-3e4ea4a9fc37

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, 6:39 PM UTC

Timestamp in NIST pulse 1888279

Truestamp Capture Time

Aug 3, 2026, 6:43 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)

35b63390f2246051d86ea713596d84298c0e10cbd7f690687400cab2eb4d77ee

Public Key (Base64 encoded)

1hHbF5H5u8LiSp+nVMRb8duR2eGkOo5Q1JYfcmAtF28=

Signature (Base64 encoded)

YlFVyRZUjCb2qha4MkKXeoUL7hQ+keRxS4jaiP2MzE/T1D9BJwSXMCwkS1nwVnm9V5YKQxnYae2m6MWXu95pBw==

Verify Signature Manually

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