Check out the melodies I made with an AI assistant I created (human-in-the-loop still but much quicker than if I tried to come up with them from the scratch): https://www.youtube.com/playlist?list=PLoCzMRqh5SkFwkumE578Y.... There are also good AI tools for other parts of making music, like singing voice generation.

Sampling has been part of music for a few decades now. That presents all the copyright issues you could want.