Hey everyone! Thought you guys might be interested in a little DApp we've put together at Convergent to try to test out the waters. It is a smart contract that mints and burns tokens along a determined price path. To add some excitement we've added the utility of spending the token to change the image displayed under the "unlocked" portion of the billboard. You'll need Metamask and some ether to interact with it! Good luck!
This is a remarkably good idea. You can store an onion hash in a blockchain transaction and then use the signature of the key which sent that transaction to verify it.