I actually wrote my autopsy in my Supreme Court class on a similiar topic. I would suggest reviewing the Tasini vs. New York Times Co. case for a little background and familiarity. Finally, I would suggest getting some good advice from counsel that is experienced in this type of law.
I'm having some trouble finding out information about copyrighted music. The song in question is from 1965 but I don't want to use it entirely, just literally 6 seconds of it. Does anyone know anything about copyright law that could help out? Thanks! (I'm hoping the lawyers on GC might know) :-)