What is a blockchain?

In this way, a blockchain is the foundation for immutable ledgers, or records of transactions that cannot be altered, deleted, or destroyed. This is why blockchains are also known as a distributed ledger technology (DLT).

How are blockchain blocks stored?

Blockchain blocks of data are stored on nodes—the storage units that keep the data in sync or up to date. Any node can quickly determine if any block has changed since it was added. When a new, full node joins the blockchain network, it downloads a copy of all the blocks currently on the chain.

What happens when a block is added to the blockchain?

Whenever a new block is added to the blockchain, every computer on the network updates its blockchain to reflect the change. By spreading that information across a network, rather than storing it in one central database, blockchain becomes more difficult to tamper with.

What is the role of miners in a blockchain?

The miners act as modern clerks who record transactions and collect transaction fees. All participants across the network reach a consensus on who owns which coins, using blockchain cryptography technology. What is the difference between a database and a blockchain?