A collage would be fair use, yes I believe that’s already been established but again I’m not like a copyright lawyer or anything like that. I’ll leave that for others to research and prove in the courtroom.
I would say that your first example, as it file is not really accurate but the collage may be more so. It’s a statistical model that calculates statistically what a thing should be. Is it learning? Maybe maybe not.
Archival grade m-discs, apparently. I had the same question. https://www.howtogeek.com/858426/whats-the-best-way-to-store-data-for-decades-or-centuries/
https://www.amazon.com/s?k=archival+mdisk