Comment by Sargos

> IMO, there's a multibillion dollar company waiting to be founded to provide authenticity verification services for humans online.

Any kind of widely used identity/authentication system would need to be a protocol and not a product of a for-profit corporation. Businesses take on great risks if they use another corporation's products as part of their core operations as that product owner can change the terms of service at any time and pull the rug out from under them. A protocol is necessarily neutral so everyone can use it without risk in the same way they use HTTP.

For identity protocols I think BrightID (https://www.brightid.org/) is becoming more established and works pretty well.