The Serbian Music Authors Organization, or Sokoj, is the oldest, and until recently, the only organization for collective protection of music copyright and related rights. As a non-profit organization, Sokoj has played important role in establishing and developing the system of copyright legal protection, struggle for better economic status of domestic music authors, protection of rights of foreign authors, as well as the promotion of national cultural values.
Music Publishing is the business of protecting and promoting song copyrights and collecting the royalties that these copyrights generate. Think of a song as intellectual property (it's an original piece of art!), and music publishing as the business that makes sure that songwriters get paid a fair compensation when their intellectual property is used by companies. Those companies could be record labels (mechanical royalties), radio stations, bars, and restaurants (performance royalties), or film studios and advertising agencies (sync license fees), and many more.