Yes, you have to upload your docs to prove your Canadian residency status. You have to check while applying if you have provided either of the below:
1. Passport
2. PR
3. Canadian Birth Certificate
4. Canadian Citizenship Certificate
5.Secure Certificate of India Status.
I know during application, you could apply using the first 2, not sure about the last 3. You can also call them and check what you used during application.
Thanks basakchiranjit - I did not upload anything about my Indian passport when I expression of interest form. I dont have Canadian Passport yet - just PR card. I just checked again - I believe just one of the above listed documents is needed to prove status in Canada but please feel free to correct my assumption.