Copyright law is a combination of which areas of legislation

Copyright Law: The Legal Background

The U.S.
Constitution grants Congress the power to enact a federal system of copyright laws.
Although a federal statute governs copyright law, there are also some state laws on copyright that deal with issues not covered by the federal law.

U.S. Copyright Law Basics

Anyone dealing with issues related to copyright and licensing in the U.S., whether creators or users of copyright-protected materials, needs a basic understanding of U.S. copyright law.
What rights are covered under copyright.
Who owns copyright in a work.
And how long does copyright last.
This simple guide to U.S copyright law basics will help you.

What are the penalties for violating copyright law?