← Back✦ Free
Protect your work
Upload your manuscript to generate a cryptographic proof of authorship — timestamped and anchored on the Bitcoin blockchain.
1
Upload your file
PDF, DOCX, TXT, EPUB — max 50 MB
2
We hash it
SHA-256 fingerprint, no file stored on our servers
3
Timestamp issued
Recorded in our database + submitted to OpenTimestamps
4
Download certificate
Your proof of priority, verifiable forever