Thanks for the prize and competition, mumbly. It was somewhat mysterious, just like the identity of Satoshi when one first discovers Bitcoin

On day three, just enough "web-searchable" key facts were given, and I was lucky to be passing by the thread sooner than the other person that also gathered the answer on day three.
These facts are just like parts of a composite key in a database. At some point it starts to point to an unique entity in a "dataspace".