With the exception of the US, there's no "Copyright Office" where copyright is registered at. Copyright is automatically given for any work having sufficient "level of art" - a bar which is very low. It is not even required to state © for the work. However, if a work indeed has sufficient "level of art" can only be determined in an IP court of law.
It seems to me that copyright doesn't exist anymore as a reasonable notion and effective right for an individual creator--A.I. being the final stake through the heart