Shadow_7 wrote:You don't have to register to have a copyright, it just makes it easier and quicker if you have to sue someone for violating your copyright.
This is an important point here: services like mailing your song to yourself or to a copyright organization is always optional. This is stipulated by the
Berne convention. From that page:
wikipedia wrote:Copyright under the Berne Convention must be automatic; it is prohibited to require formal registration (note however that when the United States joined the Convention in 1988, they continued to make statutory damages and attorney's fees only available for registered works).
Of course copyright means that you have commercial intent, otherwise release it in public domain sort of way. Creative Commons and other routes to ensure that you have some retention of rights.
CC actually depends on copyright to work. Copyright gives you the power to say "i created this, so you cannot copy it, unless ...". CC provides standardized ways to formulate your 'unless'

.
(not a lawyer, just took some Masters'-level IP rights classes in university)