I think -- copyright should apply to humans only and be non-transferable from the original artist except in cases of death. Grant copyright to individuals or joint copyright with groups with fractional right for 7 years if the work is distributed, 1 year if not. Legal entities cannot own any copyright at all.
Never hear about this idea until now, but I think this is the most logical. Copyright applys to humans, and original authors, and should not be transferable.
If you wrote the song, or book, it is yours. That's it, no one else can be owner of it.