ProofReg
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01 · Choose a file02 · Digital fingerprint03 · Registration certificate

Register · one file registration

Register your work.

Choose one clear version. The SHA-256 fingerprint is calculated locally in your browser; the file stays on your device.

After your choice, the digital fingerprint appears here.
Several files to register?Use Multiple Files · 1 credit per file.Registering with two parties?Use Duo · 2 credits together.