Automated way to verify user identity

Whats the best way to get people to verify their identity for the purpose of preventing fake accounts on a social site.

For example, Zoosk does the following:

Members who choose to verify their photo will be prompted by the system to record and submit a video “selfie” that will capture the individual’s face from a variety of angles. If the moderators approve the member’s photo, he or she will be notified and a Photo Verified badge will be added to their profile.

However I'm interested to know if there's a clever way to do this without human intervention (aside from using Amazon Turk service or the like, I mean fully automated)