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The Bitcoin School
For people who want to understand Bitcoin. Not flip it.
Plain language. Sourced chapters. Live on-chain data from a real node. Huge glossary, Rabbit Holes, and one opinionated Journey from "what is money?" to running a full node. No altcoins, no affiliate links, and no signup needed to read any of it.
From the glossary
The 2021 soft fork (BIPs 340, 341, 342) that brought Schnorr signatures, Taproot outputs, and Tapscript to Bitcoin. Every Taproot output looks the same on-chain regardless of the underlying script.
Read full entryNew on the site.
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Rabbit Hole · 15 min
Use It Once: Why Reusing a Bitcoin Address Is Dangerous
One bitcoin in four sits at an address that was spent from and then paid again. What a reused address gives away, to whom, why it keeps happening eighteen years after the whitepaper said not to, and how to stop without rushing.
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Rabbit Hole · 40 min
Rat Poison, Tulips and a Pet Rock: Everything Bitcoin's Been Called (so far)
Bitcoin is dead, they said, and a Ponzi scheme, a tulip bubble, rat poison and money for drug dealers and terrorists. Every label, who said it and when, which ones can actually be scored, and what happened next, including the calls that held up and the ones our own side got wrong.
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Rabbit Hole · 14 min
The 2013 Chain Fork
On 11 March 2013 a software upgrade split Bitcoin into two chains. Developers, pool operators and exchanges argued it out in a public chat room and put it back together in under eight hours. This is the log, with the timestamps.
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All rabbit holesCustody and Privacy
How do I hold it safely and privately?
- Mt. Gox to FTX: The Custody Graveyard
- Privacy on Bitcoin: What Works and What Doesn't
- Use It Once: Why Reusing a Bitcoin Address Is Dangerous
Hard Questions
The strongest objections, including where the critics are right.
- Quantum and Bitcoin
- Bitcoin and Energy
- Rat Poison, Tulips and a Pet Rock: Everything Bitcoin's Been Called (so far)
Corrected in public.
All corrections-
The requester publishes a public point, the searcher returns an offset, and the requester adds the two to get the full private key, which only the searcher never learns; the entry says so and tells the reader to check the address before funding it. 1BitcoinEater is described as the opposite construction (hand-written text with a computed checksum, no key search, no key) and linked to the burn-address entry, with BitMEX's 3BMEX deposit addresses as the genuine example. The tools are VanitySearch and vanitygen++, with a note that the original vanitygen is Base58-only. Taproot prefixes take the same number of tries but cost more per try, and a service hands over a private key, not a seed.
What was wrong -
BIP-360 says a P2MR output becomes vulnerable to long-exposure attacks whenever one of its scripts reveals a public key, so the protection depends on not reusing keys. P2MR is a destination for coins that move to it and does nothing for keys that stay exposed. Neither BIP mentions the other, and BIP-361 lists a post-quantum signature BIP as its requirement, which P2MR is not. The entry now says all three.
What was wrong -
BIP 361 (Post Quantum Migration)
The draft puts Phase A about three years (160,000 blocks) after BIP-361 activates and Phase B two years after that, about five years in all. Its authors say no rescue protocol is believed possible for P2PK and point to a separate Hourglass proposal instead, list abandoned coins staying unspendable as a benefit ('supply discipline'), and cite 2027 to 2030 as an 'as early as' estimate sourced to McKinsey. The entry now says all of this and adds Taproot outputs as the third way a public key ends up on chain.
What was wrong