Record that your exact file version existed before a verifiable moment — without making the content public.
Made the deadline? Prove which version already existed then.
ProofReg records that your exact file version existed at or before a verifiable moment, with an independent timestamp on the XRP Ledger.
With a deadline it later often comes down to one question: did this document already exist then, and has it not been changed since? A file date or an email can be forged; a ledger record cannot. If you record your file before the deadline, it is verifiably fixed that exactly that version existed at that moment — before any dispute arises.
Only the 64-character fingerprint goes to the ledger; your file stays on your own computer. One thing we keep sharp: ProofReg proves existence at the moment of registration — not that an authority received or accepted it. So record at or before the moment that counts.
ProofReg helps at any moment where it later counts that a file existed before a certain time.
Record which submission or attachment existed before the closing time.
Prove which documents were ready before the closing date.
Record which version you had before the hand-in deadline.
Prove your text, design or concept existed in time.
ProofReg records your file in three steps: choose your file, register before the deadline, and verify it later.
One document or a zip with all attachments. Your browser calculates the fingerprint locally; nothing is uploaded.
The fingerprint goes onto the public XRP Ledger with a timestamp. Do this at or before the moment that counts.
You receive a certificate id and verification link. Anyone can later check that this version existed then.
ProofReg proves the existence of a file at a moment, and explicitly leaves receipt, identity and acceptance out of scope.
ProofReg is the existence-on-a-date anchor; alongside other records it becomes stronger.
Do you have, besides the ProofReg registration, a receipt email, an upload confirmation or a screenshot of the portal? Then ProofReg covers 'which version existed when' and those other records cover receipt. Together they tell a complete, verifiable story.
With ProofReg Duo a second party can moreover record the same version independently. Then it is fixed not only that it existed, but that you both held exactly the same version.
ProofReg automatically creates a certificate with every registration and anchors that certificate itself on the XRP Ledger too, at no extra cost.
You receive the certificate by email. The certificate can carry the email address it was sent to; because it is delivered by email, whoever holds it had access to that mailbox at that moment — so the proof is tied to an email address, not to a verified identity.
Because the certificate itself is on the ledger, no one can undetectably alter or backdate it afterwards — not even us. So even your proof has a proof, which anyone can verify without ProofReg.
ProofReg records that this exact SHA-256 fingerprint, with the label and registrant you entered, existed on the XRP Ledger before the recorded ledger timestamp. That is independent and publicly verifiable, without sharing the document.
No. Your browser calculates the SHA-256 fingerprint locally. Only those 64 characters, plus an optional label or registrant you choose, are recorded. The file never leaves your computer.
Yes. A ProofReg certificate states the fixed anchoring account, the certificate id and the issue date. With those, it can be verified in a few steps on any public XRP Ledger explorer, without ProofReg.
ProofReg Duo lets two parties each record the same document independently. Only when both fingerprints match exactly does the mutual registration complete. It proves you both held the same version, not that you agreed.
A registration costs from €1, paid with credits. Verifying a certificate is always free and account-free.
No. ProofReg proves that your exact file existed at or before that moment — not that an authority received or accepted it. If you register before the deadline, it is fixed that you already had that version then. A receipt email or upload confirmation makes the story more complete.
Then ProofReg only proves the file existed at that later moment, not that it already existed before the deadline. So record it at or before the moment that counts.
Updated July 2026