Critical factors of the blockchain application are believed to be due to halal awareness from company leaders, the benefits obtained, and the ease of implementation. The purpose of this paper is to explore awareness of halal integrity, the perceived benefits, and the possible implementation of blockchain applications for halal integrity.  Some critical factors of a blockchain application that are investigated such as are awareness of halal integrity, perceived benefits of halal integrity, and priority implementation of halal integrity in the upstream and downstream supply chains.  Two companies in the pharmaceutical and chicken slaughtering industry were used to understand the how their opinions for three main questions of this study. The selected companies are companies that pay attention to the blockchain application as one of the important applications that can be used to increase their market increase by strengthening halal integrity. The research method used to collect the responses from the key managerial personnel with experience and knowledge using online interviews. Through this research method used, the understanding of blockchain application for halal integrity in the pharmaceutical and food industry especially the slaughtering industry can be discovered.