The development of the smart healthcare industry requires them to adapt to new technologies, because every year a lot of data is stolen or used by other parties, because the smart healthcare industry deals with very sensitive data that must be managed in a secure way. Electronic Health Records (EHRs) store various types of personal and sensitive data. there have been many surveys that prove the loss of data stolen and used by other parties. Therefore, we propose a new technology to be used in sensitive data storage in smart healthcare systems, namely blockchain. but we also apply another method in blockchain to store data that is with multichannel. The advantage of blockchain also is that it provides transparency, security and privacy using consensus-based decentralized data management on top of a peer-to-peer distributed computing system. then the use of the multi-channel method can also make data storage possible with several channels at once where each channel has its own data. By proposing a blockchain technology and multi-channel method, we will experiment and evaluate the results of the experiment.