This document describes the architecture, design and implementation of the component: “Blockchain-Based Threat Registry” or BBTR, in the SPHINX project. This document goes deep into the BBTR component, first of all presenting the state of the art and the justification of the use of a Blockchain technology for implementing such component, and then describing the different steps to enable this component in the SPHINX Framework. Interfaces, which are the connection points with other components of the ecosystem are also presented in the document. Besides, as the component is related to three of the SPHINX use cases, these use cases are enumerated and it is also explained how this component interacts with these use cases.