Imagine a notebook that everyone in the world can see but no one can erase. Now imagine that this notebook isn’t stored in just one place, but copied and constantly updated on millions of computers at the same time. That, in essence, is what a blockchain is. A blockchain is a digital ledger — a tool used to record information. But unlike a spreadsheet on your computer or a company’s internal database, this ledger isn’t owned or controlled by any single person or company. It lives across a vast network of people, all checking and confirming that everything recorded on it is correct. So, what does a blockchain actually ... (full story)