Check my post https://tiangong.space/nip5-verification/
Discussion
NIP-05 is not verification. it's an identifier. please stop referring to it as verification. read the spec. the spec mentions verification zero times.
Why am i able to create npub from btc txid (hex) using Nip-05? Do i own all those npub keys?
Just asking...
No, because you don't have the corresponding nsec.
Also it's NIP-19, NIP-05 is for the email-like identifiers. See: https://github.com/nostr-protocol/nips/blob/master/19.md
appreciate 👏