Never reveal the data.
Timestamp. Check for integrity.
Proof of Existence
The code from our BTC notary application is now available as a public and open-source service.Read the docs
Get started with Poex.io
$ npm i -g @proofofexistence/cli
installed 1 package in 0.556s
$ proofx -h https://proofofexistence.com mydocument.pdf
Proof of Existence - Verify your documents
File hash OK (sha256)
Connection to https://proofofexistence.com...
New BTC document proof registered!