Guaranteeing compliance with regulations in enterprise security log management is an important challenge since legacy systems do not have immutability, auditability, and real-time verification. In this paper, a Tamper-Proof Compliance Framework based on Hyperledger Fabric, a permissioned blockchain, is introduced to securely harvest, verify, and store security logs from various SIEM (Security Information and Event Management) systems. The architecture combines JWT authentication, digital signatures, and Role-Based Access Control (RBAC) for guaranteeing log authenticity, integrity, and restricted access. All registered organizations work within a reserved Hyperledger Fabric channel, isolating data and independently validating compliance. Automated verification of compliance is achieved through the application of smart contracts (chaincode) that compare logs with most significant controls from GDPR, PCI DSS, and NIST CSF in order to have a dynamic compliance scoring system evaluating real-time adherence and issuing alerts for failures. Through decentralized architecture, this is improved in terms of security, openness, and regulatory compliance enforcement, ensuring a scalable and tamper-resistant compliance solution for contemporary enterprises.