Deposit or register your works with cryptographic proof of authorship and date. Tamper-proof. Legally recognized. Instant.
Three steps. No middlemen. Cryptographic certainty.
Upload any file — up to 512 MB with the Deposit plan, up to 5 GB with Register. The hash is calculated in your browser before upload — we never see the content unless you want us to.
MD5, SHA-256, and SHA-512 fingerprints are recorded with a timestamp, your identity, and locked in our system — immutably.
Receive a verifiable certificate with a unique code. Anyone can verify its authenticity instantly on our public verification page.
Annual deposit or one-time 10-year registration. Transparent pricing per work.
Secure deposit of your work with cryptographic proof of authorship and date. Simple receipt included.
Full registration with certificate, cease & desist letter, legal documents, and version history. Valid for 10 years.
Monthly subscription for institutions. Members get unlimited deposits and registrations included.
Enter a certificate code, or paste a MD5 / SHA-256 / SHA-512 hash.