Is Origin Protocol a Blockchain?

Could you elaborate on whether Origin Protocol qualifies as a blockchain? There seems to be some confusion in the community regarding its underlying technology. Some argue that it leverages blockchain capabilities, while others maintain it's a decentralized platform without a traditional blockchain implementation. Clarifying this distinction would be immensely helpful for those interested in understanding the technical underpinnings of this project. Does Origin Protocol utilize a public blockchain like Ethereum or does it employ a different approach? I'm particularly interested in how its architecture differs from traditional blockchain solutions and how this affects its functionality and scalability.