Question: How low is the minimum threshold of creativity for copyright protection?Discussion: An ostinato is a continually repeated musical phrase or rhythm. Marcus Gray (aka Flame) used an ostinato in his song “Joyful Noise.” The song was never a commercial success, although a performance of it online received millions of views.Five years later, singer-songwriter Katy Perry created “Dark Horse.” It was a big hit, and Perry performed it during the Super Bowl halftime show in 2015. “Dark Horse …