{c}

For a detailed analysis of one transaction see: <Nelson-Mandela.jpg>.

Best guess so far, all in ASCII hex of output scripts:
* remove the single output value different from first one from payload, that's the change, and it is randomly placed as far as I see
* 64 bytes: hex address of top level text
* 1 byte: some random punctuation
* decimal number of bytes of some payload
* 1 byte: some random punctuation
* 64 bytes: same as the first address
* CR LF
* ends in NUL


Source: cirosantilli/cool-data-embedded-in-the-bitcoin-blockchain/atomsea-and-embii-data-format