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This land is your land, and this land is my land.

This land is your land is one of the most famous American folk songs ever written.

It's even been called our other national anthem.

But this song, somehow, does not belong to you and me.

You can't sing it on stage or put it on a record or in a movie without paying someone to use it. The only way I can even play it is because of fair use. And this song has been enveloped in a growing national debate about copyright law. This land was made for you and me.

For thousands of years, people have been making and sharing music, and for thousands of years, nobody really owned it. It just existed.

But with the rise of our ability to sell music, the way we determine who owns it has changed dramatically. My name is Sandra A-Stars.

Sandra is a professor at George Mason University.

And I teach a class here where we represent artists and entertainers on copyright and entertainment law issues.

To start with the very basics, copyright law is intended

to protect authors of creative work. Whether those are musicians or literary authors or software programmers,

visual authors. To create work, you have to just record it or write it down. You don't even

necessarily have to sell it or market it to own the copyright.

A lot of people don't realize that you don't need to go to a government entity and register for a copyright in order to own a copyright in your work.

You as the author own the copyright in the work from the moment that it's set down

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