I'm not sure if you still have this need, but it's possible for the "Go To Proof" button to work in a documents report, I believe it should also work in a document version:
displayname=Proof Link
shortview=true
textmode=true
valueexpression=CONCAT("https://{insertyourulrhere}.my.workfront.com/document/",{currentVersion}.{ID},"/proof/",{currentVersion}.{proofID},"/view")
valueformat=HTML