Conversation so far:
What is blockchain?
A blockchain, originally block chain, is a growing list of records, called blocks, that are linked using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data.
What problem does blockchain solve?
Blockchain technology solves the Byzantine General's Problem using a proof-of-work consensus algorithm

Question: How does it work
Self-contained rewrite: How does blockchain work?