Is RSR proof of stake?

Could you please clarify if RSR, the Reserve Rights token, utilizes a proof-of-stake consensus mechanism? If so, how does this consensus method work in the context of Reserve Rights and how does it contribute to the security and decentralization of the network? I'm particularly interested in understanding the role of staking in the RSR ecosystem and how it differs from other proof-of-stake implementations. Your insights would be invaluable in helping me understand the technical underpinnings of RSR and its position in the cryptocurrency landscape.