Hrm, what about games such as Alundra? It had multiple disk artworks that you randomly got, the exact same data on the disk & nothing on the cover to distinguish one from the other. Unless someone had went out of their way to collect them all - which would be truly impressive - there's no way one person could upload an image of all of them.
Granted, this is probably a super-rare case and I'm not even a stickler for having the disk art (I have to draw the line somewhere lest my OCD drives me insane
) but just as devil's advocate wondering how that would be handled.