Sorry. I'm just going to answer your blockchain question.
What we're using blockchain for is integrity proofs. We use it as a method to implement triple blinds so the issuer of the data can demonstrate that they wrote the data and that's the same data that they gave to the user to present. The receiver can get the data and know that it hasn't been altered. Then the consumer can have confidence that we're not oversharing data. That's what blockchain is being used for.