I usually also check the acutal street name on the sign using street-level imagery, so this should not be an issue. These are on-the-ground facts and street names are usually made by municipalities and are not copywritten. Geographic names cannot be copywritten in Canada, so no issue here. The geobase of roads that was imported into OSM at the beginning for Canada uses local/provincial databases of streets and roads. All these municipalities and province ministries did not sign any waiver to make their street names and street geometry available. It is simply public domain data.