mama1965

Blockchain is a unique type of database in that only data can be added to it (not removed or changed). It's true that its name "Blockchain" kind of means "a chain of blocks" - that's what we call the information added to the database. Each block maintains an index that reverts to its predecessor and generally contains a mixture of transaction information, timestamps, and other metadata to confirm its authenticity. The entries cannot be edited, deleted or modified in any way because they are linked in this way. As this will nullify all subsequent blocks.