copyleft

sturclub is dedicated to the public domain:
all music, art & words are copyleft.


creativecommons copyleft licence


what is copyleft? - the GNU project

copyleft describes a group of licenses applied to works such as software, documents, music and art. where copyright law is seen by the original proponents of copyleft as a way to restrict the right to make and redistribute copies of a particular work, a copyleft license uses copyright law in order to ensure that every person who receives a copy or derived version of a work, can use, modify, and also redistribute both the work, and derived versions of the work. thus, in a non-legal sense, copyleft is the opposite of copyright.
more: wikipedia on copyleft

• This doesn't make sense. It can't be both Public Domain and Copyleft.