Abstract: A computer-implemented system is shown for secure transactions between users, based on a network of blockchains, and a computer-implemented method employing such a computer-implemented system, wherein the architecture of the network of blockchains is defined by rules of smart contracts defined by users at each transaction, allowing extreme agility in governance, sovereignty and interoperability and allowing the optimization of information exchange/validation both in speed and consumed resources. The computer-implemented system further enables Trust implementation to achieve self-sovereign identities for objects to remove or reduce human intermediation in data management and organization.