One of Intellectual Property Right (IPR) areas is Copyright, in deciding copyright, it is applied a system which is called as Declarative System. It means that copyright is created automatically when a creation is created which is realized in a form that has a specificity, without any obligation to register. With the enactment of such a system it is certainly not easy to prove the rights of the creator in the event of a dispute. The copyright fields are the fields of science, art and literature. Violations is very susceptible happened in a creation in the field of science, both in taking certain parts as material for writing a creation by other parties in limited quantities or even in amounts that exceed the limits of reasonableness. This research was conducted using a normative method supported by empirical data through field research. In the event of a dispute, the copyright proof of the scientific work, uses proof of rights in the form of work, for example; in the form of books, manuscripts, journals, and writings published in certain media as well as letters of registration if registered with valid evidence; The basis for determining copyright infringement, such as not mentioning the source completely or exceeding the fairness limit.