In Canada pleasure craft must be licensed or registered. They also should have an MMSI. This is used to identify the vessel in case of maritime emergency and also for convenience in radio communications.
Most vessels will just require licensing. https://www.pcl-pep.snbservices.ca/1001/PubWeb/Default.aspx?lang=en-CA
Registration is needed if you are commercial or are going to travel to other countries. (US excluded)
MMSI can be applied for here