An article shedding light on the history of sampling and modern sampling laws.
The US authority on promoting progress of the arts and protecting for the works of authors. This site has extensive information on copyrights in various forms of art. A service providing automated copyrights clearance on the net.
An article taking a practical look at sample clearance.
MCPS is a site with several guides and articles about music copyrights, licenses, sample clearance, royalties etc. Their services also include sample-licensing - being the middleman between the original copyright owner and the sampling artist.
Free legal advice to commonly asked questions about music laws, record contracts & sampling.
A collection of articles and guides to sampling, music copyrights, contracts etc, written by Michael P. McCready.
A reference site to help identify public domain songs and public domain music - Royalty free music you can use anywhere and any way you choose.
An article at Electronic Musician explaining the process of clearing a sample. This article also has links to other relevant resources.
An essay on sampling laws in today's music industry by Molly Mcgraw.
A site with several articles about sampling & laws related to it - The philosophy of sampling, a history of digital sampling, the samplist & turntablist frequently asked copyright questions, and links to other related sites.