Not so much. They keep emailing…

Not so much. They keep emailing that their proofs are not working.

In nostr we have NIP-39 but it's not hugely used:

https://github.com/nostr-protocol/nips/blob/master/39.md

There is the excellent:

https://nostr.directory/

And some folks use keyoxide, tho im not a huge fan:

https://keyoxide.org/