What is Copyright? A copyright is the exclusive right to copy a work, or to permit any other person to do so. The owner of a work’s copyright has the sole right to control any publication, production, reproduction and performance of that work, or its translation. Copyright also includes the right of its owner to prevent people from reproducing significant portions of a work or from creating very similar expressions. What will be considered a very similar expression or a “significant portion” of a work will vary depending on the case. A copyright holder also has the right to demand.