You can only register your contribution if you know the film or series production where the relevant music title is included. A licence for the use of library music titles is often issued without e.g. the film producer having to commit to report this to GVL. As a consequence we do not know that the title has been used in the respective film.

If you do not know the film title and you cannot research this information or find it out e.g. from the library music label, you cannot register this contribution.