Like in the US in Canada there is no published Stud Book any more and the Online Publication starts with the 2019 stud book, so there is a gap of 50 years. You can get copies of pedigrees from their portal, but the costs are out of proportion.
What is free for registered users is the List of Conformation Titles Awarded, the dogs are listed with RegNr, Sire and Dam. You can sort them by clicking on the header, I sort usually by Breed. Registration is free.
Another source is CanuckDogs.com, information for Canadian canine events online. The link here goes to the Breed Points site, where you can select the year (starting with 2009) and the Breed. No RegNr or parents given, but a lot of dogs are with picture and with luck with a link to their website.