OHIP is Ontario health Insurance Plan ...it is a report record your visits to the doctors during your stay in Ontario ..which will be a very good evidence for your residency ...
I took with me school records ..rent contract of my apartment ...all original bank statement and credit card statement ...all original mobile phone bills and phone , cable , internet bills ... any records which support my residency like my driving test records ..if you have utility bills ...membership with fitness center ...car registration papers ...