In the rapidly expanding Internet of Things (IoT) ecosystem, ensuring device integrity and trust remains a critical security challenge. Compromised devices can introduce malicious data, disrupt networks, and undermine the reliability of IoT-based systems. This study proposes a blockchain-enabled remote attestation framework designed to provide secure and verifiable integrity checks across distributed IoT environments. The proposed model integrates lightweight cryptographic attestation protocols with a decentralized blockchain ledger to record and validate device states in real time. Utilizing a hybrid architecture, the system employs a trusted attestation agent on each IoT node, which periodically generates integrity proofs that are verified and immutably stored on the blockchain network. This ensures transparency, tamper resistance, and non-repudiation of device integrity records. Experimental validation demonstrates the framework’s efficiency in detecting compromised nodes with minimal computational and communication overhead, making it suitable for resource-constrained IoT deployments. The findings highlight the growing importance of decentralized trust mechanisms in achieving scalable, verifiable, and resilient IoT security architectures.