Evidence

The forensic package, built for a courtroom

A single file that lets a lawyer, an auditor or a judge verify your timestamp without trusting bastamp.com. You build it in your browser, from the document you already hold.

Available once your document has been timestamped and anchored on-chain.

Drop your original file

requiredstays on your device

The file is required. Its SHA-256 is computed on your device and matched to the anchored record, and any preview is built from it. Nothing is uploaded.

Click to choose a file, or drop it here

Images, PDFs and videos get a thumbnail; other files get a document card.

Nothing reaches our servers

The package is assembled in your browser. Your document and its preview are processed locally, exactly as when you timestamped the file. We only ever receive the SHA-256 hash.

What is inside

cover.pdf — a plain-language cover sheet for the court.
certificate.pdf and proof.json — the certificate and the machine-readable proof.
manifest and README — so the bundle itself is tamper-evident and verifiable by hand.
preview — a thumbnail or document card, built locally from your file.

Written so a non-technical reader understands it

The binding between the proof and the document is the hash. The cover sheet states, in plain language, what the package proves and what it does not.

Read the API docs