Osmotic computing is an emerging concept for managing aggressively distributed IoT applications facilitating IoT ecosystem to compensate the limitation of computational, power consumption resources' capabilities offer the extension for IoT system to use the power of IoT, edge, and cloud resources within a federated environment to grantee utilization and efficiency of these re-sources. In essence, osmotic computing solves end-to-end IoT solution issues related to the orchestration, deployment, and reconfiguration of osmotic abstraction microelements (MELs) that are constructed and federated across cloud, edge and IoT infrastructures. In consequence, while enabling the dynamic orchestration of the osmotic resources, there is opportunity for attacks and security threats resulting from the continuous reconfiguration of the osmotic topology where providing security and privacy is a key issue in which malicious software/hardware injection at-tacks are compromising data security, integrity, and confidentiality. Blockchain is a fundamental technology, as a distributed and decentralized ledger, is a nominated solution to face the security limitations of osmotic computing solution. The objective of this research is to propose a new blockchain based osmotic computing architecture to leverage private permissioned Hyperledger Fabric (HLF) blockchain aiming to present a security guard by tracking MELs operations into the blockchain ledger to offer authorized access control and establish the root of trust for applying the principal features of traceability, immutability, transparency, and auditability. The implemented architecture prototype is tested on both simulated and real-life environments to validate the architecture hypothesis of running a transparent and traceable osmotic IoT ecosystem maintaining the required security levels.