You can verify any broker's licence in the AMF's public register, by name. A licensed broker must act in your interest, explain the conditions in writing and disclose any conflict of interest. In Spanish people also say broker or asesor hipotecario; Quebec documents say "courtier hypothécaire".
The difference from a bank's advisor is range: the bank employee can only offer that bank's products; the broker works with several lenders (banks, credit unions, monoline and alternative lenders).