Rohan a budding musician created a lot of musical notes for his upcoming video. He was extremely thrilled to listen to his compositions. He presented his compositions to his friend Victor. The release of musical video of Rohan was getting delayed for a few months due to shortage of cash. Meanwhile Victor used most of the musical compositions of Rohan in his video. Rohan was extremely upset to know that his friend had cheated him and used all his work. What could have Rohan done to save his work? Identify and explain it.