Blockchain and Web 3.0 Solutions: Idena.io and humanode.io are the two leading blockchains in the decentralized identity use case. Idena is personhood verification is presence-based, Humanode is biometrics-based.
Discussion
Here is a good summary of the different Proof-of-Personhood #blockchain for identity verification. It’s a bit bias because written by the Humanode team but accurate overall. https://medium.com/paradigm-research/revolutionizing-identity-verification-an-introduction-to-proof-of-personhood-pop-protocols-9c318b7e9eca