Translations:VAIF Technical FAQ/13/en
PoP works by creating, storing, and then applying ATV (Altchain-to-VeriBlock) and VTB (VeriBlock-to-Bitcoin) data structures. This context is necessary to validate altchain PoP transactions and perform fork resolution correctly. It requires an unbroken chain of PoP transactions for every keystone, which is to be expected in any MainNet environment.