The formal verification of auctions has recently received considerable attention in the AI and logic community. We tackle this problem by adopting methodologies and techniques originally developed for Artifact Systems, a novel paradigm in Service Oriented Computing. Specifically, we introduce a typed version of artifactcentric multi-agent systems (AC-MAS), a multi-agent setting for Artifact Systems, and consider the model checking problem against typed first-order temporal epistemic specifications. Notably, this formal framework is expressive enough to capture a relevant class of auctions: parallel English (ascending bid) auctions. We prove decidability of the model checking problem for AC-MAS via finite abstraction. In particular, we put forward a methodology to formally verify interesting properties of auctions.