There is a lack of interest and empirical analysis in the existing literature on composers’ relations with their publishers and the role of Collective Management Organizations (CMOs) within the system of music copyright. The purpose of this paper is to explore and understand the influence of digitization within the music industry on the copyright enforcement in the Netherlands and on rights holders and the CMOs. Also to explore and understand how their mutual relationships are affected by digitization of the music industry. A qualitative analysis was done by reviewing scientific literature, performing a documents analysis and doing open interviews. In the existing economics of copyright literature, the main focus is set on transaction costs, efficiency and welfare topics. The findings can be used to understand and model how rights holders and CMOs cope with the digitization and contribute to the policy makers and economic actor’s discussion about future improvement of the copyright enforcement system.