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Tagged: verification
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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.
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.
Glossary
Chronolocation
The investigative practice of establishing when digital evidence such as a photo existed or was captured - Truestamp supports it by proving a submission window, giving evidence a verifiable existed-by guarantee while never claiming creation time.
CLI (truestamp)
The open-source truestamp command-line client, a single static binary for macOS, Linux, and Windows that submits items, downloads proof bundles, and verifies proofs fully offline without an account, signing in through the browser as a pre-registered OAuth 2.1 PKCE client.
Data integrity
The affirmative guarantee that the exact bytes submitted to Truestamp remain unchanged - any alteration changes the data's SHA-256 fingerprint and breaks the proof, so a verifier who re-hashes the data detects even a single changed byte; one of the three product pillars.
Offline verification
Checking a Truestamp proof bundle using only its own contents with no call to any Truestamp server, by recomputing domain-separated hashes, walking the Merkle inclusion and epoch proofs, and verifying the Ed25519 signature; on-chain confirmation is the only optional network step.
Proof bundle
The single self-contained JSON or CBOR file downloaded for a committed subject, carrying subject data, hashes, Merkle proofs, an Ed25519 signature, and at least one public-blockchain commitment so anyone can verify it offline, discriminated by an integer top-level t type code.
Provenance
The third pillar of Truestamp's product framing - the traceable origin and history of data as a signed, publicly verifiable chain of evidence from submission through block inclusion to public-blockchain commitment, deliberately bounded to make no claim about who authored the content.
t type code
The integer discriminator at the top of every proof bundle and inside each cx entry, drawn from a frozen registry namespaced by decade (10-19 block-like, 20-29 item, 30-39 entropy, 40-49 commitment chains); never renumbered or reused, and bound into the signed payload.
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.
Integrations
In-App AI Chat Assistant
The Truestamp in-app AI chat assistant, a sticky slide-out sidebar that answers questions about Truestamp and your own data using a read-only, actor-scoped set of tools, works for signed-in users and (when enabled) anonymous guests, offers a per-item deep-link, and is gated by feature flags.
Truestamp CLI
The open-source truestamp CLI, a single static binary for macOS, Linux, and Windows that creates, downloads, and verifies cryptographic proofs from the terminal, installs via curl, Homebrew, or Go, signs in with browser-based OAuth 2.1 PKCE, and verifies proofs fully offline.
Product
What Truestamp Does Not Prove
The honest limits of a Truestamp proof - it attests submission timing and data integrity but not creation time, not authorship or ownership, not the truthfulness of the content, and not that data existed before it was submitted.
What Truestamp Is
Plain-language overview of Truestamp, the data-integrity and timestamping service that turns submitted data into a portable cryptographic proof that the data was submitted within a proven time window, independently verifiable by anyone without trusting or contacting Truestamp.
What Truestamp Proves
The affirmative guarantees of a Truestamp proof - data existence and integrity that the exact bytes existed unchanged, submission within a time window bracketed by public-blockchain commitments, and independent offline verification against Stellar and Bitcoin without trusting Truestamp.
Verification
Proof Bundle Wire Format
The self-describing JSON and CBOR wire format of a Truestamp proof bundle, its integer top-level t type code (block/beacon/item/entropy plus Stellar/Bitcoin commitment codes), the fixed-width Ed25519 signature payload layout, and how the bundle is verifiable offline.
The Proof Lifecycle
How a Truestamp proof comes to exist and strengthens over time as an item is submitted, committed into a block via item commitment, and that block is committed to Stellar and Bitcoin via block commitment.
Verify a Proof
Step-by-step guide to verifying a Truestamp proof bundle offline by recomputing the leaf hash with domain separation, walking the Merkle inclusion path to the block root, and confirming that root against the public Stellar or Bitcoin commitment, via the verify web page, JSON:API, or GraphQL.
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API Documentation
Comprehensive guides for the REST and GraphQL APIs, including interactive documentation and code examples.
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Quick answers to the most commonly asked questions about timestamping and verification.
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