Since there is no public register for copyright works in contrary to patents, designs and marks, from which the priority of the works could be learned, it is often difficult to proof such priority of copyrighted works.

Accordingly it is important that the author always records his ideas, drafts and compositions. Such documentation should take place continuously during the creative process, as not only completed works, but also drafts and parts are legally protected.

Thereby not only the creation of work itself, but also its exact time of creation must be recorded. Sometimes in a copyright dispute it can be crucial if it may still be recognized afterwards, whether the own work existed already one week earlier than an imitation and/or a plagiarism.

 

Theodor Mommsen, 1852 - 1854 professor in Zurich, on a photograph around 1900. What is individual, the pictured person, the picture or both?