nostr:npub1d03clrrrma7mlpxm0mz2dehmhkx3nh9rhxqwltgctpwyduztymustepzfs is there a way to claim a fediverse account and just mirror what I post on Nostr to Mastodon or vice a versa? Or do I need to setup  nostr:npub10qdp2fc9ta6vraczxrcs8prqnv69fru2k6s2dj48gqjcylulmtjsg9arpj and just move my nostr keys and mastodon account on there?