btc3r
Record. Remain. Reveal.
Bitcoin anchoring for documents, hashes and long-term proof.
For individuals
Plain-text message
You can inscribe a short, readable message directly onto the Bitcoin blockchain, where it remains permanently and publicly recorded. This is ideal for marking a moment, sealing a personal commitment or leaving a durable trace that anyone can verify. Once confirmed in a block, the message can never be altered or deleted.
Digital fingerprint
btc3r lets you fix a document or a message in time by inscribing its fingerprint onto the Bitcoin blockchain, without ever revealing its content. You obtain a timestamped, tamper-proof proof of anteriority, useful for a manuscript, an artistic creation, an idea or a private agreement. Every inscription can be verified by anyone, at any time, using a simple transaction identifier. You keep full control of your files, as only their digital fingerprint is made public.
For businesses
btc3r gives businesses a reliable way to timestamp contracts, minutes, deliverables and intellectual-property assets with recognised evidential weight. Anchoring on Bitcoin establishes an enforceable proof of existence, aligned with article 1358 of the French Civil Code and eIDAS Regulation (EU) No 910/2014, without relying on a centralised trusted third party. Confidentiality is preserved, since only the document's SHA-256 fingerprint is inscribed, never the document itself. The service fits into your document workflows and delivers, for each deposit, an invoice as well as a certificate that can be used in the event of a dispute. You thereby strengthen the traceability and integrity of your archives over the long term, at a controlled cost.