Spencer on Nostr: Yeah a web of trust is essentially just a group of nostr identities that I have ...

Yeah a web of trust is essentially just a group of nostr identities that I have expressed interest in by following them. They can prove it's "really them" by signing events with their private key. I can even be reasonably trusting of my followers' followers, that's a layer deeper in the web.

If you're interested, the Wiki on Web of trust goes into far more detail:
https://en.wikipedia.org/wiki/Web_of_trust