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 5 GB. 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.
Pay once per work. No subscriptions required for individuals.
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.