CoreLogic doesn’t actually address this possibility in its privacy policy, though its now-deleted opt out form did refer to this process as “permanent”. Additionally, it mentions that it may share your details with third parties in the event that it’s acquired by another company.
To be on the safe side, we’d suggest checking back in with CoreLogic periodically. Some email providers even allow you to schedule periodic messages, allowing you to request deletion every few months. At the moment, automated data-removal services like Incogni don’t support CoreLogic, but they will prevent most other data brokers from sharing your personal info.