Start here: How Bitcoin works
Follow one payment from a wallet to confirmations before choosing a deeper path.
Follow these 4 lessons in order, or choose the topic you need. Each lesson combines an explanation, a worked example and practice inside the Guild.
How Bitcoin works
Follow one payment from Alice's wallet to Bob, through independent node checks, a miner's candidate block, and confirmations.
35 minutes · Open lessonTransactions, outputs, locks, keys, and addresses
Build one payment from spendable outputs and follow how an address becomes a locking script, a key authorizes an input, and change becomes a new output.
45 minutes · Open lessonBlocks, mining, difficulty, and validation
See how a candidate block is assembled, how proof of work is found, how difficulty is encoded, and why full nodes still decide whether the block is valid.
55 minutes · Open lessonFull nodes, the blockchain, and reorgs
Connect peer messages, mempool, block index, chainstate, most-work selection, confirmations, and temporary reorganizations into one full-node view.
65 minutes · Open lesson