Blockchain is a decentralized database that is stored simultaneously on multiple computers connected to each other on the Internet. Blockchain is also called distributed ledger technology because the entire chain of transactions and the current list of owners are stored on their computers by many independent users. https://forexstore.com/free-forex-robots shows examples of how the work does chain checking for all financial services. And it looks like a collaborative system. Even if one or more computers fail, the information is not lost.