I doubt an identity system designed today would have JPEGs and plain text in a great big XML file. More likely it'd contain digital signatures of hashed documen

I doubt an identity system designed today would have JPEGs and plain text in a great big XML file. More likely it'd contain digital signatures of hashed documents, including structures that could verify but not reconstruct biometrics. So the blockchain (or "list," if you prefer) would be able to answer yes/no questions, but that's it.