Copyrights are obtainable on all types of creative works. The critical question is: Do you own the rights in the software, CD, DVD, or other work that you paid so much to have developed? Federal copyright law is very unforgiving in this regard. With a couple of exceptions, unless you have a written agreement in place, the contractor will own the work and you will only have a license to use it.
Let Brown Patent Law make certain that you have proper copyright agreements with your employees and contractors signed and in your file before any work begins.