This is less of an enhancement and more of a suggestion around a currently used WordPress solution for attribution. This was discussed as part of the FSE Outreach Program's All Things Media effort:

Pressbooks is a WordPress based book publishing system built on WordPress Multisite. Pressbooks has included attribution built into the media library. Importantly, because they have done that, images are not only marked as creative commons visually, but also are marked in the code.
https://guide.pressbooks.com/chapter/media/

You can see a demo of what this looks like starting here from the hallway hangout.