Braincities, a long-existing AI-as-a-Service company, the creator of DATACHAIN: the smartest and most secured network ever built on blockchain! DATACHAIN is designed for a data-driven world where AI will have to process Zetabytes of data in real time to provide context-aware recommendations. DATACHAIN will host BRAINER, the first Decentralized Cognitive Operating System. Its design fills a security breach in the data storage and data streaming industries. DATACHAIN provides a secure decentralized solution making data injection impossible to ensure point to point data integrity.