POEX.IO

Possibly Exceptional

Certify documents

Drag and drop your document here, or choose a file.
Your file will not be uploaded. Learn more.

Input a Document Hash

Imput the SHA256 checksum hexadecimal digest for your file here.

Demonstrate ownership. Never reveal the data.
Timestamp. Check for integrity.

Logo Proofx

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
+ @proofofexistence/cli@1.0.3
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!

Get in Touch


Reach for us

Or send us some love at feedback@poex.io