If I don't state where it is used, that might work for me, but not for the next guy that comes along and wants to reuse a texture from my game in their own.
This is not just a theoretical concern, some Linux distributions like Debian can be pretty picky when it comes to copyright, so having a clear record of the copyright of every single file would be really helpful. A plain text file is ok if it is properly maintained, but it's also easy to simply lose some files in the process, as it is all done manually. Tools to automate that process that can be integrated into the CI would be very welcome.
My dream would be that tools like Gimp and Krita would be able to automatically keep track of the copyright of the images you copy&paste into them, as that would not just track the copyright of the original images, but also all the remixes that you produce out of them.
