[mikecb]

Interestingly, Deepmind's Ben Laurie has been working on certificate transparency-like tech to permit a verifiable audit log of access to data like this, precisely for this purpose: https://qz.com/929833/googles-goog-deepmind-is-using-blockch...

If you want to take a look at the underlying technology, take a look at https://github.com/google/trillian