What is Public Domain? Public Domain is a category of a work / music having no copyright protection and, therefore, it belongs to the world. When a work is in public domain it means it is available for unlimited use by any person. Authorizations and permissions and/or payment are not required for use. Except with respect to certain foreign origin works eligible for restoration of copyright, once a work falls into public domain, the owner can never recapture the rights. If you find the Music Powers site helpful - please consider visiting the sponsors - thank you.