In this project, we want to build an application can manage the identification (ID) of users who check-in at public places such as hotels, airports, buildings,… Hyperledger Fabric Blockchain framework are two core technologies used in this project. Every time users visit a public place, they do check-in process by the application installed in an embedded device (such as mobile phones). The application scans their face and requires some basic information such as name, purpose of visit, … and add their check-in information to a blockchain-based database as a new block. If some special organizations such as government or police want to check the history check-in of a user for a special purpose, they can query this information from the application. Because the data written to a blockchain-based database cannot be changed, the information queried from the application can be authenticated.