In order to deal with the verification of large systems, compositional approaches postpone in part the problem of combinatorial explosion during model exploration. The purpose of the work we present in this paper is to establish a compositional framework in which the verification may proceed through a refinement-based specification and a component-based verification approaches. A constraint synchronised product operator enables us 1) an automated compositional verification of a component-based system refinement relation, and 2) safety LTL properties of a whole system from local safety LTL properties of its components. The main advantage of our specification and verification approaches is that LTL properties are preserved through composition and refinement.