I went digging.
APRA = Australasian Performing Right Association Limited
ECAD = Escritório Central de Arrecadação e Distribuição
SOCAN = Society of Composers, Authors and Music Publishers of Canada
VCPMC = Vietnam Center for Protection of Music Copyright
CS stands for collections society. In another age CS would stand for the Mafia.
All but ECAD were found from here: https://www.cisac.org/