Entropy

NIST Beacon Observation

An independently verifiable temporal proof from an external entropy source.

Observation ID: 019fc8a9-4dd1-7bd2-8bca-8754c3aa0871
Capture Method: Polling
Captured At: Aug 3, 2026, 5:26 PM UTC

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

{
  "block_id": "019fc8aa-1f12-70bf-99e4-f5f23a5c0a70",
  "capture_method": "http_poll",
  "entropy": {
    "pulse": {
      "chainIndex": 2,
      "outputValue": "7E5249A1ADE705696A5B339EAD384BA8E84ED63E9A60DEBC8D161B99CF4CC498E80438F7202242109BC2E8A2525C5F911C8832CAA3CF08C0D043BE0FD08B8403",
      "pulseIndex": 1888202,
      "timeStamp": "2026-08-03T17:22:00.000Z",
      "version": "2.0"
    }
  },
  "entropy_hash": "d277733288886082a29003cdd36efcb64a7f9b65e863d7fa9a7c1dfabed065dc",
  "id": "019fc8a9-4dd1-7bd2-8bca-8754c3aa0871",
  "inserted_at": "2026-08-03T17:26:06.545778Z",
  "metadata": {},
  "metadata_hash": "5dd81d4309de99c9f8e70822e760f0eece8c33370ff5fb5da3af75bab0cbaab8",
  "observation_hash": "234a36d2d25af24df5e893d245170cb920d22122ab8cbe6bb9f6df90218e7f57",
  "signature": "LsJyo/5IefuI/sOACLzS3mbsdD5zGFUGgARJVrZN5zlzk8ljkHClujzpf02rQDiXziRGAcnZe4ntYZMyfGszBg==",
  "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":"7E5249A1ADE705696A5B339EAD384BA8E84ED63E9A60DEBC8D161B99CF4CC498E80438F7202242109BC2E8A2525C5F911C8832CAA3CF08C0D043BE0FD08B8403","pulseIndex":1888202,"timeStamp":"2026-08-03T17:22:00.000Z","version":"2.0"}}

Entropy Hash

d277733288886082a29003cdd36efcb64a7f9b65e863d7fa9a7c1dfabed065dc

Observation Hash

234a36d2d25af24df5e893d245170cb920d22122ab8cbe6bb9f6df90218e7f57

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: 019fc8a9-4dd1-7bd2-8bca-8754c3aa0871

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, 5:22 PM UTC

Timestamp in NIST pulse 1888202

Truestamp Capture Time

Aug 3, 2026, 5:26 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)

234a36d2d25af24df5e893d245170cb920d22122ab8cbe6bb9f6df90218e7f57

Public Key (Base64 encoded)

1hHbF5H5u8LiSp+nVMRb8duR2eGkOo5Q1JYfcmAtF28=

Signature (Base64 encoded)

LsJyo/5IefuI/sOACLzS3mbsdD5zGFUGgARJVrZN5zlzk8ljkHClujzpf02rQDiXziRGAcnZe4ntYZMyfGszBg==

Verify Signature Manually

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