As the creator of the music (assuming that it is original music), you have copyright to the music and legal remedies if people make copies and profit from it (or result in loss). People who pay for music are not going to bother piracy, and people who are pirating are not going to pay for it. Your chances of beating them using legal means are probably better than having a reliable but widespread protection model.
So, in case this was not obvious - do not worry. Popularity / fame will probably bring you more value than your music.
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