Abstract: To address the single point of failure, tampering risks, opaque verification, and the spread of misinformation in centralized news architectures, this paper proposes and implements a blockchain-based decentralized news retrieval and aggregation architecture that enables trustworthy storage, verifiable retrieval, and transparent governance of multi-source news data. The architecture integrates blockchain, smart contracts, and distributed storage to form an integrated chain–contract–storage trust system; a consensus mechanism ensures trustworthy data sources, and smart contracts automatically enforce governance rules to achieve traceability and high trustworthiness. An MVF robust task allocation algorithm and a KMPT/TMPT dual-layer verifiable indexing mechanism are proposed to optimize task scheduling and index verification, thereby improving retrieval and verification efficiency. The system incorporates Merkle tree–based integrity verification and a multi-source reputation weighting mechanism to enable adaptive adjustment of source reputation, enhancing retrieval accuracy and system robustness. The system is deployed in a distributed manner on an OpenStack private cloud and experimentally validated using 106,532 news records collected in 2024. Experimental results show that, compared with traditional solutions, trustworthy verification accuracy improves by 15.6% (P<0.01), the anti-tampering detection success rate reaches 99.6%, and the fake news suppression rate reaches 92.4%. The deep integration of retrieval and verification processes further improves the overall effectiveness of trustworthy retrieval by 22.3% (P<0.05). These findings verify the feasibility and engineering effectiveness of blockchain in trustworthy retrieval and data governance, providing theoretical support and engineering reference for building a highly transparent and auditable news ecosystem.

摘要： 针对集中式新闻架构存在单点故障、篡改风险、验证不透明和虚假信息扩散等问题，提出并实现了基于区块链的去中心化新闻检索与聚合架构，实现多源新闻数据的可信存储、可验证检索与透明治理。架构融合区块链、智能合约与分布式存储，形成“链—合约—存储”一体化信任体系；通过共识机制保障数据来源可信，智能合约自动执行治理规则，实现可追溯与高可信性。提出MVF鲁棒任务分配算法与KMPT/TMPT双层可验证索引机制，用于优化任务调度与索引验证，以提升检索与验证效率。系统引入Merkle树完整性验证与多源信誉加权机制，实现信源信誉自适应调整，增强检索准确性和系统鲁棒性。系统在OpenStack私有云环境下完成分布式部署，并基于2024年采集的106,532条闻数据进行实验验证。实验结果表明，该架构相较传统方案，可信验证准确率提升15.6%（P<0.01），抗篡改检测成功率达99.6%，虚假新闻抑制率达92.4%。检索与验证流程的深度融合使可信检索综合效能提升22.3%（P<0.05）。研究结果验证了区块链在可信检索与数据治理中的可行性与工程有效性，为构建高透明度、可追溯的新闻生态体系提供理论支持与工程参考。