This sounds very cool. I've been thinking a lot about this exact issue and have been considering building something similar. You are much further along than I am, and truth be told I am busy with other business.

Scaling trust is hard. Trust isn't transitive. Trust means different things to different people and is specific to each relationship. Trust anchors are scarce in a decentralized system, but maybe there are things we could do about that.

Decentralized identity is also hard. All we really have is consistency. It is hard to distinguish well-connected identities from hydra attacks. People aren't yet used to thinking about identity in sophisticated ways.

I am curious how you're solving these problems. Have you published your human rank algo?