Did you know that in 2013 someone paid 0.596175 BTC (55.46) to embed the Bitcoin whitepaper in the blockchain? And the transaction (54e48e5f5c656b26c3bca14a8c95aa583d07ebe84dde3b7dd4a78f4e4186e713) was confirmed in a block by @LukeDashjr's Eligius mining pool? How did they accomplish this without Taproot or OP_RETURN? Turns out they just stored the data as bare multisig pubkeys. It seems embedded arbitrary data is only really limited by one's creativity. Fun fact: the script used to embed this data in the blockchain is ITSELF embedded in the blockchain several blocks earlier in transaction 4b72a223007eab8a951d43edc171befeabc7b5dca4213770c88e09ba5b936e17. You can reconstruct the PDF from a Linux node with the following command: https://x.com/lopp/status/1352896865478565889