How Bitcoin Works Under the Hood (Must Watch)
Ideas to take with you.
- 01
Bitcoin does not store balances — ownership is a chain of unspent transaction outputs that every full node re-verifies back to the genesis block.
- 02
Digital signatures secure authorization but not ordering; the blockchain and its cryptographic hash exist specifically to solve the double-spend problem.
- 03
SHA-256 outputs cannot be worked backwards, so finding a valid block requires trillions of guesses per second — this is where energy becomes an anchor to the natural world.
- 04
Because each block's hash is an input to the next, no attacker can pre-compute a chain; every ten minutes the race resets on top of a fresh, unknowable value.
- 05
The difficulty adjustment recalibrates the hash target roughly every two weeks, preserving the ten-minute cadence regardless of how much hash rate joins or leaves the network.
