The Bitcoin Blockchain
The Blockchain is the database that keeps track of all transactions on the bitcoin network. It is a de-centralized ledger- instead of being stored in one- or even a few- locations, a complete copy of the blockchain is stored on every full node of the bitcoin network. This approach has major advantages over a centrally stored system. It means there is no danger of the whole system going down because of a malfunction or attack, and it means the network itself won’t slow down due to over-congestion of traffic going through a single point of entry.