Don't trust us. Check it yourself.

This page recomputes the entire TSI IP Vault hash chain in your own browser. No account, no API key, no server-side step you have to take on faith.

Why this exists: a proof you can only check by asking the person who made it isn't a proof — it's a promise. Everything below runs as JavaScript on your machine using the browser's own SHA-256. Save this page (Ctrl/Cmd-S) and it still works with the network unplugged, years from now, even if this company is gone.

1 · Load the ledger

Fetch it live, or paste a copy you saved earlier — an old copy is the stronger test, because we can't change what you already hold.

2 · Verify the chain

Recomputes every entry's hash from its own fields and confirms each one commits to the one before it. Any edit, insertion, deletion or re-ordering breaks the links from that point on.

Amendment history

A sealed record is never edited. If something needs correcting, the correction is sealed as its own new, chained entry that points back to the original via addendum_to — so the whole trail stays visible and tamper-evident. Nothing is ever quietly changed.

3 · Verify a document

Have a copy of a sealed document? Drop the file, or paste its exact text. We hash it here and look for that fingerprint in the chain. Your file never leaves this page.

Drop a file here — or click to choose

Verify it by hand (no code, no us)

Canonicalize {seq, proof_id, public_title, content_sha256, sealed_at, prev_hash} per RFC 8785 — in practice: sort keys, minify JSON.
SHA-256 that string → it must equal that entry's entry_hash.
Each entry's prev_hash must equal the previous entry's entry_hash; entry 1 uses the literal GENESIS.
The final entry's entry_hash is the published root.

Any SHA-256 tool on earth reproduces this. Nothing here is proprietary — that's the point.