So.... lets discuss something else for a minute. If you decide to build an airplane, for example.... there are different rules one must comply with when the airplane is registered depending on if it is home built or factory built. You can buy kits, which contain all the parts and in some cases, some of the parts are assembled in the factory. But to qualify as a home built airplane, and to comply with the regulations, the kit builder must contribute a minimum of 51% of the effort in the build. Many kits are advertised as 49% complete to meet the home built requirements.

So, back to music. If you are claiming the copyright on something that originated as AI or machine content, you should have edited it to the point where you have done the most work on the finished product. If AI writes 3 verses and a chorus, and you change a few words and a couple of lines, that would probably not qualify as "significant amount of human authorship" in the eyes of the LOC. The bigger question though is, how are they going to know exactly how much you wrote vs how much was from the machine or even that it was machine produced content at all? If you don't disclose that fact, they will never really know.

Currently, it's down to what your conscience lets you do.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.