Source: https://wearabledocs.com/timestamp-certificate Digital certificate # Proof of what you filed, and when Every document you upload gets a certificate: the date we received it, its digital fingerprint, and a seal from an independent service, anchored to the Bitcoin blockchain. [Get a plan](https://wearabledocs.com/cart?seats=1) [How the evidence works](https://wearabledocs.com/evidence) ## What the certificate records One page that shows exactly what you filed and when it arrived. **The date received** When your signed document reached us, in your own time zone. **A digital fingerprint** A SHA-256 fingerprint of the exact file. Change a single pixel and it no longer matches. **An outside seal** The fingerprint is signed by an independent timestamping service the moment you file. **Anchored to Bitcoin** The seal is anchored in a Bitcoin block, where the date cannot be edited or backdated. **Nothing private leaves** Only the fingerprint is sent out. No page, no name and no part of your document. **Every version** Amend your document and the new version gets a certificate of its own. ## One page, kept with your document Download it from your account any time, print it, and keep it with the signed original. **A sheet of its own** The certificate is separate from your document, so your document stays exactly as you signed it. **Anyone can check it** The fingerprint and the seal can be checked with free tools, without a WearableDocs account. **Your file, unchanged** We store your document exactly as it was received and never alter it. **Ready when you need it** If you ever need to show what you filed and when, the certificate is ready to print. **The proof, named** The certificate names the proof page where the seal can be looked up. ## Why it matters **1 page** ### Per version A single sheet to keep with your signed original. **32 bytes** ### All that leaves Only the fingerprint goes to the outside service. No page, no name and no part of your document. **0** ### Ways to backdate Once anchored in Bitcoin, the date cannot be edited or moved by anyone, including us. ## Proof you can hold in your hand A certificate comes with every document you upload, on every plan. [Get a plan](https://wearabledocs.com/cart?seats=1) [How the evidence works](https://wearabledocs.com/evidence)