Copyright protection and immutable attribution are not the same thing. These systems are designed to perform the latter, not the former. The only effective tool for protecting the right to copy digital art/media is force.
This is amazing to me. We're 30 years on from Richard Stallman's "information is free" observations, 20 years since Napster, less than 20 years after Bittorrent, 5 years since the decentralised competitor to the most significant political force on Earth (i.e. the power to print money), the whole "music charts" culture is basically dead, and people actually believe "copyright" is still a valid concept?
Everyone has had the right to copy since magnetic tape technology. That was in the 1960's. It's over. Move on.