> It doesn't have to be pretty. It could be a UUID v7 stacked on top of another UUID v7 for all I care but it would be globally unique and available free of cos

> It doesn't have to be pretty. It could be a UUID v7 stacked on top of another UUID v7 for all I care but it would be globally unique and available free of cost. This is basically where did:plc comes in, for atproto. https://web.plc.directory/ https://web.plc.directory/ provides free ID numbers. For example, mine is https://plc.directory/did:plc:3danwc67lo7obz2fmdg6jxcr https://plc.directory/did:plc:3danwc67lo7obz2fmdg6jxcr . Your domain then uses a txt record to indicate that you want it to be associated with that particular did:plc.