FYI
A "certified copy of birth registration" is a specific document issued by the Government of Ontario. It is one of two formats of what is known as a "long form birth certificate".
It is NOT the same as a certified true copy of a document you have in your posession such as one would get from a public notary.
The link AngelDisney provided explains what the document is and how one goes about applying for it. They have both regular and expedited options.
For reference, a google search turned up this translation service website who has sample images showing what the Ontario certified copy of birth registration document looks like:
http://adrianawhiteside.com/ontario-long-form-birth-certificate/
SW
See below from that page:
View attachment 530443