If you have exported your document proof, then it's only natural to wonder how you can prove that the document has not been tampered with and that the timestamps in the proof document are correct.
To make sure you can easily validate your archive, we've created an open-source tool that checks that the hash values of your document have not changed, and follows the Blockchain proof all the way up to the Blockchain.
You can download the tool from https://provendb.com/downloads. You can get its source code from https://github.com/SouthbankSoftware/provendb-verify.
To use the tool, run it from a command line using the "--in" argument to point to the archive that you've downloaded. For instance, If I downloaded an archive for a document called ""Last Will and Testament of John ProvenDocs.pdf", then I would issue the following command:
$ provendb-verify --in "Last Will and Testament of John ProvenDocs.pdf.proof.zip" Loading ProvenDB Proof Archive `Last Will and Testament of John ProvenDocs.pdf.proof.zip`... Verifying Chainpoint Proof... Verifying Chainpoint anchor... Verifying Bitcoin anchor... Verifying Bitcoin transaction OP_RETURN... Verifying Bitcoin block merkle root... Bitcoin block height 572857 has merkle root 8e0ee3b3f1a98764b71707216ebca7ec5113b1ab781463a11375c037d09c83b7 Bitcoin transaction 12ed7b9696d7c630011cc0a2ccc0a717c0186f7edfbb5b949564fe98a6a4090c has OP_RETURN b1d2562f684326b8b77a47595f8f288a50730b98bcdbf36cd56de71d59d4bb16 PASS ProvenDB Proof Archive is verified
The open-source tool has validated the archive.
If you are technically sophisticated and want to make sure that the open-source tool is doing the right thing, then, of course, you can examine its source code. Drop us a line at [email protected] if you want us to help you understand the algorithms.
Updated almost 3 years ago