The Bitcoin white paper PDF was encoded in the blockhain in April 2013.

To reassemble the white paper into a pdf out of the blockchain

$ bitcoin-cli getrawtransaction 54e48e5f5c656b26c3bca14a8c95aa583d07ebe84dde3b7dd4a78f4e4186e713 true | jq -r '.vout[].scriptPubKey.asm' | cut -c3- | xxd -p -r | tail +9c | head -c 184292 > bitcoin.pdf