Exactly this. As an idiot I purchase DRM music when Microsoft had its own music store. Some years later they closed it and there was no way to validate music keys.
But thankfully I still have an old Roxio9( I think) CD, and back then Roxio didn't know what DRM was and would take the mp3 and burn it to DVD anyway, bypassing the key check, then I would just rip it back off the DVD...DRM is useless