In the example you gave, you can enter the Supreme Court file number in the Supreme Court case information database to get the docket entries, which will give you the date of the CA decision and the file number. (slaw.ca)
This document is «issued» by the court, which stamps it and assigns a court file number to the action. (lernerspersonalinjury.ca)
When a decision is released, it has a citation that includes the same ingredients with little variation: (1) the title / style of proceeding (or «style of cause» depending court); (2) the docket / court file number; (3) the neutral citation, if any. (slaw.ca)