Coinbase background check

Hi guys, I am in final interview process with CB and wanted to check few information from our awesome blind community. 1. Which vendor/company (for example HireRight etc )Coinbase chooses for Bg check. 2. Do they verify current employer like ( title , responsibilities and joining dates ) 3. Do they call HR or it’s some automated process? 4. Do we have option to ask Bg check company to not contact or verify current employer at all? Plz advice.