where can I access blueprint data, either through Canvas Data or API? I am looking for a way aggregate, all blueprint associations past and present for each course.
We haven't done a whole lot with Blueprint courses at my school, but I see that there's a "Get associated course information" API that seems to do just what you're interested in:
Blueprint Courses - Canvas LMS REST API Documentation
It requires you to run the API for each Blueprint course that you need information on, but maybe that's a starting point?
Retrieving data ...