MaDiTraCe: D3.4 Architecture definitions for POC implementation – Intermediate Report

This intermediate report presents an architectural framework designed to ensure traceability in critical raw material supply chains. The driving factors and concepts that set the foundation towards the architecture such as conformity credentials, data spaces and self-sovereign identities (SSI) are introduced. Then the relevant initiatives, regulations, standards, ecosystems and specifications are presented and their integration into the architecture is explained together with the architectural principles that stem from these standards.This proposed architecture recognises the significant advances made in the last few years in creating standards and ecosystems around all the different building blocks of the traceability and Digital Product Passport (DPP) architecture. A modular architecture structured around these building blocks is proposed, and all components are clearly defined with their objective, functions and the interactions with other building blocks. The use case sequence diagrams are presented as case studies to highlight how these architectural components can be exploited to creating secure and verifiable supply chains. The potential relations between the provided architecture and smart contracts are given in the discussion section together with the evaluation and next steps towards building the final architecture. The conclusions highlight key aspects of the report. This deliverable is intended for technical experts, industry stakeholders, and policymakers, guiding them toward creating traceable raw material supply chains