Copyright is recognized internationally thanks to international conventions. Generally, your copyright will be protected in other countries, but it is protected under that country’s laws so there may be some differences from the level of protection you would get in Canada. For example, in the United States copyright protection generally lasts for 70 years after the creator's death, rather than 50 years as in Canada. If you’re concerned about someone’s use of your work overseas, you will need to check the particular jurisdiction’s copyright laws to confirm whether they are infringing your copyright. Similarly, if you are publishing internationally and your work contains the work of others, you must make sure you abide by the laws in the country your work will be published in.