Extend metadata standard for channels, importantly, this may require introducing metadata submission extrinsic that only curators can use, as only curators can manage this status. The semantics are entirely social, but they mean something to the effect of this account is real. There should probably be a rationale payload whenever this status is updated.

Also this constraint is probably a wise idea:
https://twitter.com/danrobinson/status/1494210892883398657

Design >
-Joystream/atlas#2091