Judges in the US Ninth Circuit appeals court maintained their skeptical position yesterday regarding extending copyright protection to short segments of music. Or at least that’s how it seemed as Christian rapper Marcus Gray tried to persuade them to overturn a lower court judgement in his song theft legal battle with Katy Perry.Gray accuses Perry and her collaborators of ripping off his song ‘Joyful Noise’ on her 2013 hit ‘Dark Horse’.