def is_copyright_status_known(self):
return self._my_map['<STR_LIT>']<EOL>
Tests if the copyright status is known.

        return: (boolean) - true if the copyright status of this asset
                is known, false otherwise. If false, is_public_domain(),
                can_distribute_verbatim(), can_distribute_alterations()
                and can_distribute_compositions() may also be false.
        compliance: mandatory - This method must be implemented.