> In pop music we see sampling has increasingly become a major part of the art

As I understand it the reasons for the rise of sampling is exactly the opposite of what you argue here. Artists explicitly sample (with the legal paperwork) because it provides protection from claims that they copied portions of the song from elsewhere. Claims that you are much more likely to face if you instead try to create something on your own (and implicitly influenced by what you've heard and liked).

The easiest way to sidestep all of that is to explicitly focus on remixes, that and record every conversation and creative moment so that you can show it during discovery.

See for example the lawsuit over Ed Sheeran's Shape of You [0].

[0]: https://en.wikipedia.org/wiki/Shape_of_You#Copyright_trial