The word Nostr appears in text form on the Bitcoin blockchain 11 times.
10 times in op_ returns.
1 in an inscription.
Preturnio allows you to search the Bitcoin blockchain for text, which occurs 3 places now.
-Coinbase transactions, like the original Genesis Block.
-Op_returns, an unspeakable opcode for arbitrary data. Once 10,000 bytes until 2014, then 40 bytes, then 80 in 2016
-And finally inscriptions, which is growingly not just images, but more often JSON scripts for brc-20s and .sats names.
(A couple of days ago, since fees have been high lately an image of a bored ape took $138 to mint. 1million BRC-20 tokens took 74 cents. Goes to show you how much smaller a few bytes of code is in comparison to an image.)
This is pretty useful since there is no central registry for who got what .sats name, or no block explorer, so if you need to find the pepecoin history, you best bet is just searching the ticker here.
Give it a try!