Basically, you need a bank letter on the bank letter head and that letter should contain following :
1. Your Name
2. Account Number
3. Account opening date
4. Current balance in Indian Rupees
5. Equivalent of current balance in Canadian dollars( If possible)
6. Average balance for last six months mentioned separately for each month
7. Statement by bank that these funds are free from any debts and readily available for transfer.
8. Name, designation, contact address, contact number and signature of the banker issuing the letter
9 Date of issue of letter
Along with this letter, you need to upload last 6 month bank statement. If you have deposited amount in one go, then you need to include gift letter to prove the source of funds.