I think it just hashes whatever it is, and transmits a minimum of BTC to that hashed address on the blockchain. You can do this yourself for free with any bitco

I think it just hashes whatever it is, and transmits a minimum of BTC to that hashed address on the blockchain. You can do this yourself for free with any bitcoin client. Subsequently, that transaction is encoded into the blockchain forever, and could be pointed to in a court of law.