Basics: What is Blockchain Technology?

Blockchain is exactly what it is named, a chain of blocks. Each block contains a record of information, such as a deed for a house, the metadata for an image, or potentially, a bibliographic record. The chain that links these blocks together means that if someone wants to change the information in one block of the blockchain without that change being obvious, they would also need to change each individual block that comes before it in the chain.