Part 7 Recap

Part 7 of 9 — How Bitcoin Works — complete.
Part 8 of 9 — Lightning & Daily Use — starts tomorrow.

Thirty days. The complete technical picture. Here’s the full arc.

The cryptographic foundation: private keys own Bitcoin mathematically. Public keys prove ownership without revealing the private key. Addresses are shareable destinations derived from public keys. Cryptography provides one-way mathematical security. Hashing produces tamper-proof fingerprints. The blockchain chains those fingerprints into an immutable record.

The consensus layer: mining finds valid blocks through proof of work — billions of computational attempts per second. Energy use is the security deposit, not the waste. The difficulty adjustment maintains ten-minute blocks regardless of hash rate changes. Nodes validate every block independently. Miners produce history. Nodes decide what’s valid.

The transaction lifecycle: transactions wait in the mempool before being included in blocks. Fees determine priority. Confirmations grow more final with each subsequent block. Six confirmations is effectively irreversible.

Supply mechanics: the UTXO model tracks ownership through individual coin parcels rather than account balances. Hash rate measures the real-world security commitment of the network. After 21 million are mined, fees sustain miner compensation — a known long-term question the community is actively addressing.

Governance: soft forks change rules backwards-compatibly. Hard forks risk chain splits. The block size wars proved that users — not miners, not companies — are the final authority on Bitcoin’s rules. SegWit was governance working correctly.

The technical layer is now fully in place. Part 8 brings it into daily life.

— The Daily Bit