They contain all the information necessary to register the assignment with the United States Copyright Office if either party so wishes. However, registration with the U.S. Copyright Office is not absolutely necessary, although it is a good way to ensure that everything goes smoothly with the transfer of copyright. If you wish to use another person`s or company`s copyrighted material or if you wish to allow another person to use your material for a period of time, a written copyright license agreement your agreement. Create a copyright license agreement that outlines how copyright can be used, how long, and if applicable, royalties. .