Entropy

NIST Beacon Observation

An independently verifiable temporal proof from an external entropy source.

Observation ID: 019fc90d-07fa-7988-b7a0-8c11fe934dd8
Capture Method: Polling
Captured At: Aug 3, 2026, 7:15 PM UTC

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

{
  "block_id": "019fc90d-e9df-7006-9938-7233d1123e3d",
  "capture_method": "http_poll",
  "entropy": {
    "pulse": {
      "chainIndex": 2,
      "outputValue": "D72E41422015010F7798FE3B07DCB39C74E49FC59889F996710FA70D12EC42733EA762E788B79842A3CF0D89B9BE51561945D27D4A5C5971D8BF73AA7CA2BC12",
      "pulseIndex": 1888311,
      "timeStamp": "2026-08-03T19:11:00.000Z",
      "version": "2.0"
    }
  },
  "entropy_hash": "f6961826ba4e9b0326267ada16d7a6c9e42402b8cfd87024227e5db4edec9e3a",
  "id": "019fc90d-07fa-7988-b7a0-8c11fe934dd8",
  "inserted_at": "2026-08-03T19:15:02.266636Z",
  "metadata": {},
  "metadata_hash": "5dd81d4309de99c9f8e70822e760f0eece8c33370ff5fb5da3af75bab0cbaab8",
  "observation_hash": "215fca9c27001dc9a3ded4338428a8eb295afd57724373fb2f387b72469fe3db",
  "signature": "7G1S0pIXkzMU7s2N2WON6s0wDzeXYg1qoOYI/lRroZThgZ+PdWnO5Z/1yaFmXWgQVQNNyRLBnfO06itaZKC+Ag==",
  "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":"D72E41422015010F7798FE3B07DCB39C74E49FC59889F996710FA70D12EC42733EA762E788B79842A3CF0D89B9BE51561945D27D4A5C5971D8BF73AA7CA2BC12","pulseIndex":1888311,"timeStamp":"2026-08-03T19:11:00.000Z","version":"2.0"}}

Entropy Hash

f6961826ba4e9b0326267ada16d7a6c9e42402b8cfd87024227e5db4edec9e3a

Observation Hash

215fca9c27001dc9a3ded4338428a8eb295afd57724373fb2f387b72469fe3db

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: 019fc90d-07fa-7988-b7a0-8c11fe934dd8

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, 7:11 PM UTC

Timestamp in NIST pulse 1888311

Truestamp Capture Time

Aug 3, 2026, 7:15 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)

215fca9c27001dc9a3ded4338428a8eb295afd57724373fb2f387b72469fe3db

Public Key (Base64 encoded)

1hHbF5H5u8LiSp+nVMRb8duR2eGkOo5Q1JYfcmAtF28=

Signature (Base64 encoded)

7G1S0pIXkzMU7s2N2WON6s0wDzeXYg1qoOYI/lRroZThgZ+PdWnO5Z/1yaFmXWgQVQNNyRLBnfO06itaZKC+Ag==

Verify Signature Manually

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