This paper explores the potential of blockchain technology in simplifying and tracking legislative processes, addressing the challenges of document management while maintaining the separation of powers. The study examines how blockchain can enhance transparency, security, and efficiency in legislative procedures while preserving constitutional principles. Building upon the analysis of Italy's xLeges system as a case study, the research proposes a multi-level blockchain architecture comprising three interconnected but autonomous layers: a Private Institutional Blockchain for internal deliberations, an Inter-Institutional Coordination Blockchain for document exchange between institutions, and a Public Legislative Blockchain for citizen access to definitive acts. The methodology combines theoretical legal analysis of separation of powers principles with technical evaluation of blockchain capabilities, particularly focused on the implementation of the MOVE programming language for smart contracts and Akoma Ntoso XML standards for legislative document structuring. Results demonstrate that this architecture effectively addresses key requirements of constitutional democracies by ensuring institutional autonomy while enhancing document traceability, implementing selective disclosure mechanisms to balance transparency with necessary confidentiality, and providing immutable verification of legislative processes. The proposed solution offers a blueprint for legislative process modernization applicable beyond the Italian context to other constitutional democracies facing similar challenges.