There are some absolutely insane ideas in the decomp space about how copyright works.
You took a copyrighted work, did some lossless mathematical transformations on it, and have created an artifact that reproduces the original copyrighted work with perfect fidelity every time. From a legal perspective, this is effectively identical to zipping and unzipping a copyrighted file. You won't have much luck claiming that the intermediate Zip file is somehow free of copyright.
The legal problem is the original taint of using a copyrighted work (expressly contrary to its license), and the fact that nothing transformative is occurring here sufficient to enliven the defense of fair use. (Not even close, and no, this is nowhere near the realm of being arguable. The fact that this spits out a copyrighted work 'byte for byte' is a stake through the heart of any such argument.)
Decomp projects are cool, but if you work on them, please be aware that you're taking a risk, and some video game companies are famously litigious, even for old games.
You took a copyrighted work, did some lossless mathematical transformations on it, and have created an artifact that reproduces the original copyrighted work with perfect fidelity every time. From a legal perspective, this is effectively identical to zipping and unzipping a copyrighted file. You won't have much luck claiming that the intermediate Zip file is somehow free of copyright.
The legal problem is the original taint of using a copyrighted work (expressly contrary to its license), and the fact that nothing transformative is occurring here sufficient to enliven the defense of fair use. (Not even close, and no, this is nowhere near the realm of being arguable. The fact that this spits out a copyrighted work 'byte for byte' is a stake through the heart of any such argument.)
Decomp projects are cool, but if you work on them, please be aware that you're taking a risk, and some video game companies are famously litigious, even for old games.