Blockchain plays a crucial role in ensuring data provenance by providing a secure, transparent, and immutable ledger for recording transactions and data exchanges. Each transaction is cryptographically linked to the previous one, creating a verifiable chain of information that is difficult to alter. This feature helps combat fraud and enhances trust in various applications, from supply chain management to financial services. By leveraging blockchain technology, organizations can trace the origin and history of data, ensuring its integrity while allowing participants to verify authenticity with confidence.