Satoshi Proof is your personal notary leveraging the power of the Bitcoin network to prove existence of text or images at a certain time.
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README.md

Build Status

Android app on Google Play Android app on FDroid

What is this all about?

Satoshi Proof is your personal notary leveraging the power of the Bitcoin network to prove existence of text or images at a certain time. First you select a picture or enter text - then the system checks if the existence is already proven and prints out the time if so. If not you get the option to prove the existence now by transferring one Satoshi to a calculated address. The money is going nowhere ( or to a random stranger ) - but it is so little that this should not matter. Note: it can take some time until the existence is signed by the network - especially with these small amounts ( you can increase the amount if you want faster signing ).

Examples:

- Prove that a certain damage existed before a given time ( rental cars, flats, .. ) by proving the existence of an image of this damage at a certain time

- Prove that a certain idea ( text ) was existing before a given time ( e.g. for prior art arguments against patents )

Questions/Feedback:

there is a Google+ Community

License

This app is licensed GPLv3 - you can find the sourcecode on github.

Credits

- Volker Grabsch for presenting his idea Bitcoinproof at Hack&Tell and inspiring this app this way!

- The Tango Project for the icon

- Andreas Schildbach for Bitcoin Wallet

- Google for Android, Bitcoinj & Guava

- https://blockexplorer.com for the API to check for address existence

- Mister Schtief for donating me 0.1BTC which made the barrier low to start this