Anchor a document’s fingerprint to the Bitcoin blockchain and walk away with a sealed Certificate of Integrity that anyone can check themselves, with no Pasqio account and no need to trust Pasqio.
One click on any document generates an irreversible cryptographic fingerprint and anchors it to a public distributed ledger. From that moment forward, the document’s exact state at that exact time is mathematically provable — by you, by opposing counsel, by a judge, by anyone.
The proof doesn’t live inside Pasqio. It is anchored to the Bitcoin blockchain, which has run continuously since 2009 and which no single party controls, and the proof file itself is attached to the certificate — so checking it never depends on Pasqio being around.
Before Pasqio marks a certification confirmed, it replays the proof step by step and checks that it reaches the merkle root in the Bitcoin block’s own header, as served by two independent block explorers. A certification is never confirmed on a calendar server’s word alone. Each one also carries a signed time from an independent RFC 3161 time-stamping authority, issued within seconds of certification.
Every confirmed certification produces a PDF certificate designed with Federal Rule of Evidence 902(13) and (14) in mind: who certified, when, the chain of custody from upload to anchor, and everything a third party needs to check the proof without an account and without relying on Pasqio.
Signed by Pasqio, so any later change to the PDF shows in Adobe Acrobat's signature panel.
The OpenTimestamps proof and an RFC 3161 time-stamp token are attached to the PDF itself.
Who uploaded it, the hash taken at upload, who certified it, and from where.
A declaration pre-filled with the facts, for counsel to adapt before filing.
These questions used to require expert witnesses, forensic analysis, and uncertain outcomes.
Open pasqio.com/verify and drop in the document and its certificate. The page hashes the document on your own computer (nothing is uploaded), reads the proof attached to the certificate, and checks it against the Bitcoin block header fetched directly from public block explorers.
The same proof can be checked at opentimestamps.org or with the reference command-line client, and the time-stamp token with OpenSSL. None of these needs a Pasqio account. Bulk certifications come with a manifest certificate that lists every file and lets anyone check a single document against it.
For counsel: a plain-English explainer for a court, a declaration template, and a one-page verification sheet.
A single page of mathematics anyone can check.