01 — Local
Generate proof locally
The browser computes SHA hashes and drafts a manifest without uploading the original file bytes to the service.
Linked Projects • Open Provenance
Portable proof for digital files, without uploading the file itself.
AttestLog is open provenance infrastructure for digital integrity, chronology, signatures, chain of custody, public auditability, and long-term trust continuity.
What exists now
A browser-local proof workflow backed by an alpha registry.
The current prototype lets a user select a file locally, compute content hashes, generate a portable manifest draft, register that manifest, and later verify a file against the recorded proof.
02 — Register
Append-only log entries
Submitted manifests receive log metadata, a Merkle root, an inclusion proof, and a public proof URL when registered.
03 — Verify
Recheck later
Later verification recomputes file hashes, compares the manifest, and checks whether the manifest is included in the registry.
Architecture
Separate proof from storage from visibility.
AttestLog treats the manifest as the portable protocol object, not the file. Storage can live elsewhere, visibility can be public or private, and the proof can remain independently verifiable.
- Manifest JSON records hashes, metadata, lineage, and log references.
- The alpha API stores manifest JSON and append-only log metadata only.
- Public and private workflows can share the same proof semantics.
- Future validators can recompute log roots and watch for consistency.
The project stance.
- Open provenance infrastructure
- Positioned as integrity, chronology, and trust-continuity infrastructure for the AI era.
- Not a truth engine
- It does not prove semantic correctness, depicted-event authenticity, or whether media is AI-generated.
- Not Web3 theater
- The project is not positioned as a blockchain startup, NFT platform, crypto storage network, or Web3 product.
Trust continuity
Built for records that need to survive tool churn.
Digital provenance will only matter if records can move across storage providers, signing schemes, registry operators, and future verification tools without losing their meaning.
01 — Portable
Manifest-centered
The manifest remains the durable object users can download, copy, inspect, register, and verify outside a single website session.
02 — Auditable
Transparency log
Append-only registry records preserve chronology and make later tampering visible through inclusion and consistency proof design.
03 — Practical
Useful before perfect
The first public site already supports local proofs, registry submission, proof URLs, and later file-to-manifest verification.
Use it now
AttestLog is available at attestlog.org.
Open the product site to generate a local proof package, register a portable manifest, or verify a file against a saved manifest and registry record.
Project site
attestlog.org