Another clever thing about the Urbit ID scheme is that the names are meaningful. So like ~rigpen-solwer is from the sol star in the wer galaxy. I guess rigpen would essentially be random, but I did find it intellectually satisfying that there was some meaning to it beyond total randomness. Essentially though, Urbit ID is inherently Proof of Stake where stakers are Galaxy owners (they don’t even need Ethereum really. Whereas your scheme (and Groundwire.dev) would be inherently Proof of Work (Bitcoin).