You may have already seen it, but OpenPassport allows for partial disclosure of passport data. It's less applicable to the use case of the OP and more applicable for e.g. one time account verification.

https://github.com/openpassport-org/openpassport

I don't have any strong view either way on the government ID verification for online services. At least in theory though, the concept of partial/selective disclosure of passport data seems to be a good middle ground between proving humanity and maintaining privacy.