http://www.ascap.com
American Society of Composers, Authors and Producers (ASCAP)

http://www.bmi.com
BMI - the American performing rights organisation

http://www.nmpa.org/hfa.html
The Harry Fox Agency - song licensing

http://www.mcps.co.uk
Mechanical Copyright Protection Society (MCPS)

http://www.prs.co.uk
Performing Right Society (PRS)

http://www.sesac.com
Website of the SESAC performing rights organisation