The Domain Name System (DNS) is a key part of the Internet, and it is used for global domain name resolution. However, it has security risks due to its centralized or semi-centralized design and reliance on a few root servers. To improve DNS security and long-term stability, this study proposes the consensus roots system, a blockchain-based distributed domain architecture. The system uses a 1 + N master-subchain structure to solve the problem of trust and data synchronization across blockchains. The master chain acts as a relay and uses Hyperledger Fabric, a consortium blockchain platform, to support semi-centralized cross-chain communication. Subchains are local blockchains that need to connect with the master chain. To ensure safe and reliable transactions, the system uses a staged-proposal atomic swap method on the master chain. Compared to prior approaches, this work introduces a cross-chain architecture that enables more efficient trust synchronization, reducing latency and improving scalability without compromising security.