Last month, a subset of the media world snapped to attention when Jarrod Dicker left the Post, where he built out a lot of pioneering proprietary tech for the company, to become the CEO of something called Po.et, which bills itself as "an open, universal, and immutable ledger for managing the ownership and licensing of the world's creative works." It runs on blockchain, and today Dicker will explain what it is -- and how he hopes to upend the media business model as we know it.