What is a blockchain?
A blockchain is a series of digital information stored and updated simultaneously across a large number of computers, making it essentially impossible to alter or tamper with this data. In this case, the "blocks" are individual units of data identifying the owner of an NFT, and the history of any purchases, sales, or trades of that NFT (day, time, amount, etc.). The "chain" results from linking these blocks together into a single database of information.