It is now very easy to tell if a scene is bareback or not at Corbin Fisher. They added a notice at the start of the description "This video was filmed without the use of condoms. Individuals should be comfortable with such material before viewing.". However, it only applies to new scenes. I checked, older scenes did not contain the notice.
If they do add a bareback notice to older scenes, how will they describe the scenes that had disappearing condoms?