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Mr. Mayor!
I too have been following
factom.org's great adventure, although it is hard for me to understand it all (I'm not a programmer). factom seems to be the largest player in this "space" (putting up secure info on the blockchain). There are two enterprising individuals who will put a hash of whatever you want on the blockchain (and I have used them both as experiments):
proofofexistence.com and
bitproof.ioI wish them (factom and the above mentioned two guys) all the luck in the world!
Someone (IMO) is going to make a lot of money in this niche. But, I do not see how it will be
me. Buying a factoid (or two or three)? Well, would their "production" be limited? Who might buy them?
"OP_RETURN" examples (in the sense of how they look to non-owners) can be seens via
coinsecrets.org. I have found it interesting that you occasionally see unusual symbols in the outputs...