Intermediate4 lessons

Blockchain Deep Dive

How the Ledger Really Works

Look under the hood at how Bitcoin's blockchain is structured — blocks, hashes, Merkle trees, UTXOs, and fees.

20 min

What's inside a Bitcoin block — header, transactions, nonce, and the previous block link.

How Bitcoin proves a transaction is in a block without downloading the whole block.

Why Bitcoin uses 'unspent outputs' instead of account balances.

How transactions wait for confirmation and how fees get set.