To be an anarchist only means that you believe that aggression is not justified, and that states necessarily employ aggression. And, therefore, that states, and the aggression they necessarily employ, are unjustified. It's quite simple, really. It's an ethical view, so no surprise it confuses utilitarians.

We must recognize that only scarce resources are ownable; second, that the body is a type of scarce resource; third, that the mode of acquiring title to external objects is different from the basis of ownership of one's own body.

The roots of copyright lie in censorship. It was easy for state and church to control thought by controlling the scribes, but then the printing press came along and the authorities worried that they couldn't control official thought as easily.

The basis of self-ownership is the fact that each person has direct control over the scarce resource of his body and therefore has a better claim to it than any third party (and any third party seeking to dispute my self-ownership must presuppose the principle of self-ownership in the first place since he is acting as a self-owner).

In a market economy with the division and specialization of labor, people use others as means to achieve their ends. This is the essence of market cooperation.

The libertarian view is that human actors are self-owners and these self-owners are capable of appropriating unowned scarce resources by Lockean homesteading − some type of first use or embordering activity. Obviously, an actor must already own his body if he is to be a homesteader; self-ownership is not acquired by homesteading but rather is presupposed in any act or defense of homesteading.

Artists are just entrepreneurs. It's up to them to figure out how or if they can make a monetary profit from their passion − from their calling, as I discussed above. Sometimes they can. Musicians can sell music, even in the face of piracy. Or they can sell their services − concerts, etc. Painters and other artists can profit in similar ways. A novelist could use kickstarter for a sequel or get paid to consult on a movie version.