Doudou NFTs are powered by the Chia Network, an open-source, decentralized, peer-to-peer blockchain network that utilizes a novel proof-of-space-and-time consensus algorithm. This technology is significantly more energy efficient than traditional proof-of-work blockchain networks by several orders of magnitude. It also offers more decentralization and security compared to proof-of-stake blockchain networks. For more information on energy usage see: Chiapower, and on security: Chia's Green Paper