The trademark clearinghouse (TMCH) is a database of verified trademarks that are already registered with the appropriate trademark offices. It provides trademark holders a single point of access to be able to register their domain name with any new gTLDs that launch in the future. Apart from offering Sunrise registration support, the TMCH also offers a trademark claims service that helps trademark holders monitor any attempts to register domain names that may contain their trademark.
To know more about the trademark clearinghouse, please visit http://www.trademark-clearinghouse.com