Sampling in music

Much like how some low budget films use stock footage and how I am using public domain footage, musicians also use samples from other music with artists such as ‘Nujabes’ and ‘Parov Steller’ for example the song ‘Betcha is you check it out’ by ‘The Quadraphonics’ is used in the song ‘World End’s Rhapsody’ by ‘Nujabes’s’