def get_copyright_registration(self):
<EOL>if not bool(self._my_map['<STR_LIT>']):<EOL><INDENT>raise errors.IllegalState()<EOL><DEDENT>return self._my_map['<STR_LIT>']<EOL>
Gets the copyright registration information for this asset.

        return: (string) - the copyright registration. An empty string
                means the registration status isn't known.
        raise:  IllegalState - ``is_copyright_status_known()`` is
                ``false``
        *compliance: mandatory -- This method must be implemented.*