What is Nostr?

bitcoin is the final denominator
Public Key
npub1em9lxqc53kg2azknu80y9kf9fx6k2p7e3uteg24ptt32vqhx0ctsz0js76
NIP-05 Address
Ragnar@allegoriesoftheplebs.com
Profile Code
nprofile1qqsvajlnqv2gmy9w3tf7rhjzmyj5ndt9qlvc79u592s44c4xqtn8u9cw5njer
Author Public Key
npub1em9lxqc53kg2azknu80y9kf9fx6k2p7e3uteg24ptt32vqhx0ctsz0js76