This concept, together with the transaction vali- dation mechanisms on the blockchain network, led us to devise the possibility of connecting our brains to a digital platform (Datium) so that, through the interaction of users answering questions generated by artificial intelligence and in turn , creating questions that can feed back to the miners, who get as a reward, a unit crypto account ($MDCx, an acronym for Medi- calx). In this way, the Proof of Brain was born together with the creation of a database of organic exponential growth and simultaneously starting the era of the Collective Knowledge Protocol.