Now-a-days in cloud environment a large data is produced. Many organizations are now migrating to cloud environment. Thus the providers are now delivering multi-cloud environment. But clients are worrying that their data should be correctly stored and maintained by providers without tampering it. As the providers provide enough security still there are many security issues occurring in cloud. A technique for verifying integrity of client's data is called Provable Data Possession (PDP). The security system is based on multi-prover, zero knowledge proof system, which helps to satisfy completeness, knowledge soundness, and zero knowledge properties in this paper, the authors propose a PDP scheme in multi clouds to support service scalability and data migration.