Its the link that has a confirmation of your key inside each website. Take a look below for more info: https://github.com/nostr-protocol/nips/blob/master/39.md
what does "proof" mean in this context? #Amethyst
https://nostr.download/818a5d3a7b5acfcd33ccfe9be3b93c1b3d29314c161fd14f3019498b8dac5328.webp
Its the link that has a confirmation of your key inside each website. Take a look below for more info: https://github.com/nostr-protocol/nips/blob/master/39.md
thanks for the info!