Go to the "Forms" page at the U.S. Copyright Office website (see Resources).
Click the "Electronic Copyright Office" button. The U.S. Copyright Office recommends the electronic system for copyright application, but you can download the appropriate printable application forms if you prefer to apply via postal mail.
Click "Continue to eCO" after reading the privacy policy information.
Create a login name and password, then upload an electronic copy of the audio CD files you want to copyright. According to the U.S. Copyright Office, the ".wav" format commonly used on CD tracks is an acceptable file type. Other acceptable formats include ".mp3" and ".wma."
Enter your credit card information to pay the $35 application fee.
Expect to wait up to 6 weeks for your copyright approval. Do not distribute your CD until you have received copyright protection for the recordings; you do not want to risk losing the legal rights to your work while your copyright protection is pending.