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Say you see a coin's promotional materials for an ICO and want to archive that as they change their specs on the fly, leading up to their mainnet release. How would someone go about this? Denarius has a great feature built into the wallet called Proof of Data which will hash the file. Along with this a user can upload that file directly to IPFS for archiving purposes. The POD then would act as showing that uploaded file is the same unchanged file. Lets begin with an example of how to do this. https://www.ghostbymcafee.com/ It's been a while since I have seen a countdown timer on a mainnet release, so I was curious what they are offering. Reading both PDF's being offered shows something isn't right. What are the odds they change this after they got everyones' money upfront before the timer counts down to release? Who knows, so lets archive now and find out later. https://www.ghostbymcafee.com/pdfs/Ghost_by_McAfee_Litepaper_v1.0.1.pdf First I download the Lite Paper. Then I go to the proof of data tab in the QT wallet, Select File, enter narration and then click Create Timestamp. On success we get a Denarius address as the POD file hash. D address: DHe18hHTHtQKbe5h8vTZ1xpPMZvx7zfYL8 tx hash: bc574da851172857377146c9cfcd4ebb5cb5ea1508e678bc67587a7cba42a585 Then go over to the Jupiter Tab and select the same file. I want to POD the IPFS upload as that timestamps when I archived this into IPFS itself. After paying a small fee we get all the rest of the information. IPFS CID/Hash: QmSJeCZdffCqyG133MHt3JGqRrn2pSV4YraYfw6DU4SFqe Denarius Jupiter POD Address: DH9Gr5HxHDgvsJc4dhVsaNnSEkTRXwS535 Denarius Jupiter POD Transaction ID: 8a2b52571140b5cccdfacb48f5bb12d0a718a0966213695b02c2e702a3aa58c7 Can then click on View Upload file on Infura to get the Link, pretty neat. https://ipfs.infura.io/ipfs/QmSJeCZdffCqyG133MHt3JGqRrn2pSV4YraYfw6DU4SFqe Let me add the details from the 2nd PDF. https://www.ghostbymcafee.com/pdfs/Ghost_by_McAfee_Whitepaper.pdf D address: DJAzjVvgfHyaP3UAHS4SA6eWGkeYFqWeUW tx hash: e2f878428ee5217b4020de39961b5da0882155b9293720439b99d809dfd27f67 IPFS CID/Hash: QmR8FpPLzTZzYcbpyHL7nsiyLdp5dLJj8Z9t5Caf5zE2Dm Denarius Jupiter POD Address: D89F1AjQDTtgSs8HU3e5fmxLGwsGfzRPBb Denarius Jupiter POD Transaction ID: 1661258c6c85536168828cce7aa73bcbc682f52e17b31e10474ce61cbc62fcbe https://ipfs.infura.io/ipfs/QmR8FpPLzTZzYcbpyHL7nsiyLdp5dLJj8Z9t5Caf5zE2Dm I will leave it up to the user why I am showing this and comparing to 2 pieces of ICO material together showing different coins.
First you need the QT Wallet started and some Denarius coins. Proof of Data costs 0.001 D as of the writing of this guide. Proof of Data can give a hash against a file like an MD5 checksum. Except this checksum is a hash stored on the blockchain with a time and date, proving your data hasn't been altered. Lets start with an easy to find image. Carsen's github with the Denarius image located here. https://github.com/carsenk/denarius I am going to right click the Denarius logo and save to my hard drive as the example. Now open the QT Wallet to the Proof of Data tab. We want to select file, choose the image we just saved which is a long string of numbers.png. After selecting the file type in up to 24 Characters. I am going to use Denarius Logo. And then click Create Timestamp. Now we get the success message and also a Generated Timestamp Denarius Address. A transaction hash is generated after clicking OK. Input the generated address into the block explorer to see what we just did. https://www.coinexplorer.net/D/address/D9hq7DB78uh8SGmoiA3iCaqGcW3RcvmawA Now what can we do next? Lets put the same image in and Create Timestamp again. We get the same address again. https://www.coinexplorer.net/D/address/D9hq7DB78uh8SGmoiA3iCaqGcW3RcvmawA Thats the basics, and this works for more than just image files. I personally use PDF's and link the Denarius block explorer with PDF in emails so no one is changing files on me.