> Copyright also happens to be opt-out. You have to explicitly say “this is not copyrighted” for copyright to stop applying.
This isn't possible under US copyright law. You can say "this is not copyrighted" all you want, but it's still copyrighted. The closest you can get to voluntarily putting something in the public domain is to refuse to take enforcement actions against violations of your copyright.
This isn't possible under US copyright law. You can say "this is not copyrighted" all you want, but it's still copyrighted. The closest you can get to voluntarily putting something in the public domain is to refuse to take enforcement actions against violations of your copyright.