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While technically I cannot confirm 100% it is row, as it is a origin key and they never give detailed information, I can say that it is bought from the US amazon store by me personally. I just biught titanfall yesterday for another user in europe and it worked completely fine for him. I also have bought dozens of amazon keys as well, and have never had an issue of regions. That said, unfortunately the store page and comments do not mention locks.
From US Amazon store. Low rep goes first. All that.
Thanks guys...