This is basically how an optical CMM (OMM) works. There are tricks to determining and calibrating out alignment issues and determining snapshot viability, and you're touching on both of them. Very well done!
So you wanted to take pictures of cdroms with a microscope, going on a decent detour and the other way you can make a microscope from a disc player which is a really cool project [0]
[0] "Hacking CD/DVD/Blu-ray for Biosensing" https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6066758/
If you photograph and stitch a panorama of a CD at a resolution with the data visible and distribute it under your copyright, is it piracy?
Yes.
Would be really cool to read a whole CD this way. Actually, that wouldn't sound any different. You could read an LP though.
I just added an extra image where you can see contours being drawn around the 'pits' of the CD-ROM. I need to improve the speed of the autofocus etc. before I can image a whole CD heh.
For vinyl, there's always the laser player (used for preservation, too)