In the US there are a lot of companies that do these kinds of identity verification for you. I had to do one when I was setting up a new Steam Developer account and many use them for regular day-to-day verification like for work or when submitting important government requests.

It would seem a lot better to just partner with an existing company that takes care of that part of identity verification. Your job is still to compose all of these signals and metrics and distill them into a simple "everyone is human" network, but the actual job of being a passport jockey can be avoided IMO.