万国著作権条約
Unlike the Berne Convention, which does not require formalities to obtain protection, the Geneva Phonograms convention does provide one formality. To secure protection under this convention, copies of the sound recording must carry a copyright notice, one exclusively for sound recordings. The notice consists of the phonogram copyright symbol, "℗" which is the upper case letter "P" in a circle, the year of publication, and the copyright owner's name. In this way, the Geneva Phonograms Convention is similar to the notice requirement of the Universal Copyright Convention.