What is Nostr?

Public Key
npub1rp0p39vln506ceyp934ex2tgy4mk4eq5gg3nj9cxn257dwa96k0s96n5t0
Profile Code
nprofile1qqspshscjk0e68avvjqjc6un995z2am2us2yygeezurf420xhwjat8c38qqet
Author Public Key
npub1rp0p39vln506ceyp934ex2tgy4mk4eq5gg3nj9cxn257dwa96k0s96n5t0