Distributed blockchain systems face significant security threats from quantum computing, which can compromise their classical encryption methods. To address this, researchers have developed a scalable quantum-resistant blockchain architecture that utilizes twin-field quantum key distribution (QKD) to establish secure communication channels. This approach enables the creation of a secure and reliable network, overcoming the connectivity and distance limitations of traditional QKD systems1. The proposed architecture is designed to provide long-term security for blockchain networks, protecting them from potential quantum attacks. By leveraging QKD, this solution ensures the integrity and confidentiality of data exchanged between nodes, thereby safeguarding the entire blockchain ecosystem. This matters to practitioners because it provides a proactive solution to mitigate the risks associated with quantum computing, ensuring the security and reliability of blockchain systems in the face of emerging quantum threats.