This presentation is about to identify conversational bots using blockchain technology, a first step to address trustworthy challenging when social media applications are mixed with human users and social bots. Internet persona or account user profile for social bots usually is hardly being used to distinguish conversational bots from other human users. PASS (Personal Archive Service System) using blockchain technology has built in the Proof of X mechanism. The usage of such built in feature into bot identification makes users aware of bot interaction which could mitigate the threat of disinformation by social bots. Moreover, in practice, we add feedback bot score, called syn points stored in the chain during the process of registration, verification and lifecycle monitoring.