User blog comment:Captain Dashing/Is the Pirate's Code still in Effect?/@comment-4898132-20111015041207/@comment-4898132-20111015223344

They're the same thing in the POTC universe, as the organization had been called Brethren Court in AWE and Brethren of the Coast in The Price of Freedom...no matter how fictional(we have the EITC, as well as people like Blackbeard and Kings George and Ferdinand).

And yes, the Court was founded by the binding of Calypso, as from many numerous POTC material saying so. But from what I gather(which you can see above in italics), there is a strong reason why the Brethren still went on after AWE. And I also took what is known of the historical Brethren as evidence.