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A couple of great developers from HackTX a couple of weeks back created something similar during the hackathon there in just 24 hours.

https://www.hackerleague.org/hackathons/hacktx/hacks/proveme with a demo copy @ http://162.242.216.46/

I'm one of the two developers.

I got the proof server working again so you can play with it.

Try proving data and typing in "testing" (lowercase). It will tell you when we put it in the blockchain. This file should also work: http://s3.amazonaws.com/rapgenius/filepicker%2FvCleswcKTpuRX...

It's a little patchy, but it does work! Payments are fake, and don't do anything! So don't pay! I don't know how much our Bitcoin wallet has left in it. I'll try to remember what we've uploaded so you can try it out.

Bitcoin/crypto code here: https://github.com/wyager/hacktx-proveme

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