Prove a Document’s Existence Without a Third Party
With the Bitcoin Cash Notary service users can create a timestamped proof of a document’s existence without trusted third parties. A cryptographic digest of the document, which can also be a photo or video file, is stored in the Bitcoin Cash (BCH) blockchain, linking it to the time of submission. The tool acts like a digital record book that facilitates the verification of documents at a later stage.
The Notary provides you with a trustless automated solution for backing up all kinds of important information. It allows you to prove its existence by comparing the blockchain entry to your actual document and also in case the official version goes missing. At the same time, the contents are never exposed or stored on the blockchain.
To accomplish this, all you need to do is add your file by dragging it into the browser or using the file selector on the tool’s page. Note that the file will not be uploaded to the Bitcoin.com server. Then you’ll be prompted to send a small amount of bitcoin cash (BCH) and fund your blockchain anchor. That will cost you only 0.00005 BCH or less than $0.02 at the time of writing.
You’ll be able to see your proof on the blockchain by checking the transaction in a block explorer. You can also use the tool to verify that a document has been notarized by clicking on the “Verify” tab and dragging the file into the browser window. If the document is found, the system will redirect you to its proof page.