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Tagged: entropy

16
Blockchain
Public Ledger Explorer The public ledger explorer pages, no account required - the /blocks index and /blocks/<block_id> detail with commitment chain and proof downloads, the /entropy and /entropy/<observation_id> observation pages, and the real-time /timeline visualization of entropy, items, blocks, and commitments.
Entropy
Entropy Verification Levels The two verification levels of a Truestamp entropy observation, internal (hash and signature recomputation) versus external (re-checking the value against the original public source), the merged verification summary, and the clock delta between source-published time and capture time. External Entropy Sources How Truestamp captures unpredictable public entropy from the NIST Randomness Beacon, the Stellar ledger, and the Bitcoin blockchain, folds each observation directly into a block's Merkle tree, and thereby strengthens the submission-window timing guarantee against precomputation. Public Entropy Beacons The public /beacons page that exposes a finalized Truestamp block hash as verifiable public randomness, the beacon fields and chain-link, the derived fairness tools, and how to download and verify a beacon proof. Public Randomness Beacons What a public randomness beacon is, the security properties that make it trustworthy (unpredictability, bias-resistance, public verifiability, availability), and how Truestamp folds public entropy into publicly verifiable blockchain evidence.
Glossary
Beacon A public, verifiable snapshot of the Truestamp chain, the hash of a finalized or committed block published on the public /beacons page as verifiable randomness and a moment-in-time marker, with four fields (id, hash, timestamp, previous_hash) and a stable permalink per hash. Bitcoin A public proof-of-work blockchain Truestamp uses two ways: new Bitcoin block hashes are captured as entropy observations, and epoch roots are committed into a transaction OP_RETURN output, appearing in proof bundles as cx entries with type code 41 and net regtest, testnet, or mainnet. Entropy observation A captured record of unpredictable public entropy from the NIST Randomness Beacon, the Stellar ledger, or the Bitcoin blockchain, hashed, Ed25519-signed, and folded directly as a Merkle leaf into a Truestamp block, proving the block could not have been precomputed before the entropy existed. Entropy source One of the three independent public systems Truestamp captures unpredictable randomness from, the NIST Randomness Beacon, the Stellar ledger, and the Bitcoin blockchain, each yielding entropy observations with its own proof bundle type code (30 NIST, 31 Stellar, 32 Bitcoin). NIST Randomness Beacon The US National Institute of Standards and Technology public randomness service publishing cryptographically signed random pulses about once a minute in a tamper-evident chain, one of Truestamp's three entropy sources, captured by HTTP polling and re-verifiable by chain and pulse index. Public randomness beacon A service that periodically publishes unpredictable, bias-resistant, publicly verifiable random values everyone can observe; Truestamp both consumes external beacons such as the NIST Randomness Beacon as entropy and acts as one itself through the public /beacons page. Stellar A public blockchain Truestamp uses two ways: Stellar ledger closes are captured as entropy observations, and epoch roots are committed as a transaction MEMO_HASH, appearing in proof bundles as cx entries with type code 40 and net testnet or public. Verification level One of the two independent checks on an entropy observation - internal verification recomputes the stored hash and Ed25519 signature offline, external verification re-fetches the value from the original public source, and the merged summary adds the Merkle inclusion check. Verification summary The combined pass/fail report over every verification layer of an entropy observation (data hash, Ed25519 signature, Merkle inclusion, external source); it passes only when no individual check fails and marks the Merkle step skipped, not failed, until the observation is committed.
Library
Interoperable Randomness Beacons (NIST CSRC) NIST CSRC project defining an interoperable public randomness beacon that emits signed, hash-chained 512-bit full-entropy pulses every 60 seconds over a REST API, with the Beacon 2.0 format and NISTIR 8213 reference.
Product
Global Search How the search page at https://www.truestamp.com/search auto-detects what you paste (26-character item ID, block/beacon/entropy UUID, 32-128 hex digest, or free text over names, descriptions, and tags) and returns grouped items, blocks, beacons, and entropy observations with team-aware visibility.

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