Under Canadian law, artists need do nothing to protect your work except put your name on it, whatever name you choose. The easier it is to find you, the more likely someone is to contact you for permission to reproduce your work.
Bottom line, whatever name or combination of names you use protects your work and gives you control over it.
Even if you grant someone permission to reproduce your work, you can specify whether it's one time, or as often as they wish, or limit the times and ways it can be used. You can allow this for free, or charge for the use of your work.
Note, too, that you cannot copyright an idea. “Copyright is restricted to the expression in a fixed manner (text, recording, drawing) of an idea; it does not extend to the idea itself” (Canadian Intellectual Property Office).
To learn more about your rights, check out:
Canadian Intellectual Property Office
Copyright Law In Canada by lawyer Phillip B. Kerr
HAPPY CREATING EVERYONE ! ~ Rebecca