The security in cloud data has been analyzed in detail where there exists number of approaches to secure the cloud data from different threats. Blockchain technique is the recent way of securing data from variety of threats. Number of approaches available with blockchain, which uses different encryption schemes and varies in the selection of key and scheme. However, the methods suffer to achieve higher security performance. To handle this issue, an Optimized Profile Orient Blockchain Model (OPOBM) is presented in this paper. The model classifies the users under various profiles and maintains set of key sets and scheme set for various profiles. Accordingly, an encryption scheme and key is identified as per the profile given and radical profile id. Using the radical profile id, the required encryption scheme and key are choose to encrypt the data. Also, unique hash code is produced for distinct blocks with radical profile id and the index of keys selected. The same can be used to reverse the data to obtain original one. The OPOBM model hikes data security performance in cloud.