I just noticed that this disc is marked as Europe.
I would make it (USA, Europe) since my dump is most likely to be a USA disc. It was almost 9 years ago, based on the dates and lack of barcode, I'd say it either came from a local Blockbuster store or GameFly. Unfortunately I don't have any proof/picture.
Was the process for updating Xbox 360 regions to pick the dumper's region or is there any clue in the DB indicating I might have gotten a Europe disc?