LBRY (http://lbry.io) uses a blockchain to maintain an index of decentralized content, with a pretty creative naming scheme that allows writing URLs like this:

lbry://itsadisater

If you have LBRY installed, that link will go to a film starring David Cross and Julia Stiles that is being distributed, officially, via LBRY.

More on the naming/DNS thing here: http://lbry.io/what#naming.