FYI, there is already a kind 30053 to replace DNS records in Nostr. Essentially pointing to an nevent gets redirected to an IP.

nostr:npub1nlk894teh248w2heuu0x8z6jjg2hyxkwdc8cxgrjtm9lnamlskcsghjm9c and I were playing with it some months ago. We never finished it, but the idea is promising.