The role of blockchain technology in data integrity is significant due to its immutable and decentralized nature. Blockchain ensures that once data is recorded, it cannot be altered without consensus from the network participants. Each block in the chain contains a cryptographic hash of the previous block, creating a secure and verifiable chain of records. This fosters trust among users, as they can confidently access and verify data without relying on a central authority. Blockchain's features make it particularly valuable in sectors such as finance and supply chain management.