Establishing the copyrights is one thing, no objection. The objection here is not to the copyright -- I'm a software author and musical performer who respects copyrights.
The objection is to a law which trashes constitutional protections against unreasonable search and seizure, invasions of privacy, etc. This is only incidentally about copyright per se.
commerce clause
something somewhere , some how , may be sold ... or may not be sold ...
If they can say growing grain to feed your own stock is regulatable via the commerce clause because you would have had to go out in to the open market and make a purchase ... but you didn’t because you grew your own , therefor impacting the world market prices of grain ...
then they can say anything is covered under the commerce clause.
it’s a another power grab