Editors should be able to indicate that they agree with the data displayed for an entity. This could be done with a link on each entity's page which allows the editor to indicate that they've checked the data and are happy with it.

The verification status of each entity should be displayed on the entity's sidebar. Any change to the entity of any of the relationships it's involved in (including adding relationships) should reset the verification status. This could be the same criteria required to put the entity's mbid in the changed-mbids list.

There should also be a report of unverified entities which editors can use to check and improve MB data where it's most needed.