Understand the idea.
Then the details.
Eight foundation lessons, then focused guides to the questions that come next. Every article links the technical sources behind the explanation.
Build the foundations.
What Is Bitcoin?
A starting point for understanding digital money, a shared transaction history, and the rules that connect them.
How the Bitcoin Blockchain Works
A chain of blocks makes edits detectable. Proof of work and independent validation make agreement on a history possible.
Private Keys, Public Keys, and Wallets
A wallet manages the information used to receive and spend bitcoin. The coins themselves remain part of the public transaction record.
What Is a UTXO?
Understand Bitcoin’s transaction model by following one output into a payment, change, and a fee.
Bitcoin Mining and Proof of Work
Miners propose blocks by searching for qualifying hashes. Other nodes check that those blocks obey the rules.
What Is a Bitcoin Node?
Independent validation is the important part. Keeping every historical block forever is optional.
The Bitcoin Halving, Explained
A block-height rule reduces new issuance in steps. Explore the calculation without confusing it with a price forecast.
How the Lightning Network Works
Payment channels move repeated updates off the base chain, with a different set of liquidity and operational trade-offs.
Go one level deeper.
Bitcoin Privacy: What the Ledger Reveals
Bitcoin addresses are not names, but a public transaction history can still reveal relationships and activity.
3 linked sources Deep dive / 2 min readBitcoin Transaction Fees
Understand fee rates, virtual bytes, and why a larger payment does not necessarily cost more to send.
4 linked sources Deep dive / 2 min readBitcoin Upgrades, BIPs, and Forks
How proposals, software releases, and consensus changes fit together—and why a BIP number is not a network-wide approval.
4 linked sources Deep dive / 2 min readConfirmations and Reorganizations
What a confirmation count measures, why blocks can be replaced, and why no count guarantees absolute finality.
3 linked sources Deep dive / 2 min readHow Bitcoin Multisig Works
A spending policy can require signatures from several keys. Understand a 2-of-3 example and the recovery trade-offs.
4 linked sources Deep dive / 2 min readRecovery Phrases and Wallet Backups
How mnemonic words relate to wallet keys, why passphrases matter, and why some recoveries need additional information.
4 linked sourcesA few useful companions.
The Bitcoin glossary ↗
Plain-English definitions for the words you’ll encounter.
The original white paper ↗
A guided route through the document that started it.