In August of 1949, the “Walt Disney Music Company” was established. Initially, this new music company was started to publish all music written for and used in Disney films, plus any “outside product” that seemed applicable. Cinderella was its first published music (January 1950). After 1949, “Walt Disney Music Company” (ASCAP) and “Wonderland Music Company” (BMI) became the performing rights applicable organizations that all Disney music in a film, television show, stage show, or theme park event were assigned to.
[The Golden Age of Walt Disney Records by R. Michael Murray]