Copyright infringement? Warning!
If a piece of music is distributed, reproduced, performed or downloaded without the permission of the author, this constitutes a copyright infringement. Composers can issue a warning with the help of a lawyer and demand a cease-and-desist declaration and damages.
However, it is always recommended to contact a specialist in order to let your work of music analyzed and your legal chances proved.
When is your copyright infringed? What does copyright means?