Yes, when DVD waives it Right of First Refusal, it files a Notice with the servicing county website. Click on this post to see how waiver Notices can be retrieved from the Orange County Comptroller for the WDW resorts: http://www.disboards.com/showpost.php?p=40969104&postcount=5
If DVD exercises ROFR, then it will file a Warranty Deed with the county. The above post also explains how to retrieve specific warranty deeds.