Yes, if you use Referoo within Bullhorn, you can expect the result of every candidate reference check to be stored dynamically and natively within Bullhorn against the candidate record.
If you have the Certifications tab enabled in Bullhorn, the individual Referee Reports will attach against the candidate record here. The certificates will also be available in Bullhorn under Background Checks in the WorkPro Candidate Summary screen.
This function is only available if you enabled the webhooks in WorkPro and have an active WorkPro account.