The APWS is the official insignia of the FBI and the US Department of Justice. It was designed to help detect and deter criminal violations of US intellectual property laws through public education of the laws and the FBI's authority to enforce them.
You might have noticed this seal before on DVD movies, and some software, for example. In the past, the use of this seal was only available to the entertainment and software industries. Now, in the US, all copyright owners may use the seal, as long as they follow the appropriate regulations for the seal's use, which can be found in 41 CFR Section 128-1.5009.