To figure out if a contractor has an active ROC license and obtain other information related to the license, you can use
Arizona Registrar of Contractors
online service
Contracting by an unlicensed contractor does not allow residence owner to recourse through AZ ROC.
Contracting by licensed entity homeowner may also be eligible to apply to the Registrar's Residential Contractors' Recovery Fund to get up to $30,000 to complete the work properly.