See Dancing to the Music: What you need to know about music licensing tariffs and fees, an article via The Dance Current, that breaks down different aspects of music copyright...
Via ArtNet, When is artist on artist theft ok? is a specific case study in visual art, but the concepts and questions apply to dance too.
See various articles on the topic of copyright and choreography:
Copyright in Choreography in Canada
Dancing Around The Issue of Copyright Of Choreographic Works (American law)
archive.org is a library of free music, movies, books and more. Find media without copyright worries.
Creative Commons develops, supports, and stewards legal and technical infrastructure that maximizes digital creativity, sharing, and innovation. Check out their site for more info on Creative Commons licensing, Public Domain tools and...
Anne Teresa de Keersmaeker responds to Beyoncé’s ‘inspiration’ for...