# BIP16 activation (P2SH)

> A passage of **The βook of βitcoin** — the Bitcoin chain read as a book. This is
> block 173,805 read as a chapter, and its transaction 1
> (of 106) read as a section of Glossia prose. Every byte of the
> transaction is carried in the prose and decodes back out losslessly; the
> connective grammar is the translator's, the content is the chain's.

- **Citation:** I β87 ■430 §1 (Volume I, Book 87, Chapter 430, section 1)
- **Block:** 173,805 — BIP16 activation (P2SH)
- **Block hash:** `00000000000000ce80a7e057163a4db1d5ad7b20fb6f598c9597b9665c8fb0d4`
- **Transaction id:** `ee1ddad7899f13b0118693800a719e337eb3fb355986346fa68848dc1bbe5276`
- **Read live:** https://bookofbitcoin.io/bitcoin-book.html?txid=ee1ddad7899f13b0118693800a719e337eb3fb355986346fa68848dc1bbe5276

## Chapter frontispiece — block 173,805

Block hash, as prose: ⌘²⁰⁰ *Ability yes achieve pitch. Cat may see rhythm. High slim file to menu. Its husband suit bus for forum. Force pledge a tribe to slab. Each thing despair crime.* ⓪⁵⁶

- **version:** v1 — block version 1 (0x00000001) — pre-BIP9 integer form
- **previous block:** ⌘²⁰³ An above absurd set our useful buddy. Merit may noise arctic. Front rival chair to visual. Age may powder ecology. Sir derive a corn. The half october may mass crime to army. ⓪⁵³
  - hex: `00000000000006ce101199431bcc76609454139cde25d55557165cc9c575fc1d`
- **merkle root:** ⋔ Abandon set accident to a capital cube. Gallery see laundry to its oval. Science see our genius movie. Draft may see oak. Son caught to cost. Penalty may spend whale. Stomach provide thunder to fan for round. Second excite to brave.
  - hex: `dab0d384c76b29869f35d6cd5734450b33125f3ee890073b703bdb87afd54064`
- **timestamp:** 2012-04-01 00:43 UTC
- **difficulty target:** β₅₂ < 675966×256²³ — the block hash above reads below this target — nBits 1a0a507e — mantissa 675966 (2·3·113·997) shifted up 23 bytes: the target 0000000000000a507e0000000000000000000000000000000000000000000000, which a valid block hash must read below (52 leading zero bits) — difficulty 1,626,553 (relative to the genesis block)
- **nonce:** η 2·3·13·17·2989211

## § 1 — BIP16 activation (P2SH)

Transaction id, as prose: ⌘²⁵⁶ *Each abandon yet get accident. Our raw question dash setup. Dust often track a main yes. The die situate to leave. Group get tobacco for song. Service is exotic near guy. Tax may correct hire. Cheese might weasel pay. A typical half saddle pan.*

- **version:** 1
- **input 1:** coinbase (∅ — no previous output; new coin)
  - script: “BTC Guild /P2SH/”
  - sequence: ● — final — disables the transaction locktime for this input
- **output 1:** 50.13670000 ₿
  - script: ⧉ ⌖ h²⁰ Each absurd accuse an endless blame. Coast are zero to regular. A civil yes expect powder. Hurry charge a junk alpha. Pop caught kingdom to cactus. ≡ ∇
- **locktime:** □ — no locktime — final with respect to time

## Commentary

> A reading of the record, not the record. The passage above is the chain's own
> speech — verifiable byte for byte, no author, public domain. What follows is
> somebody's account of why it is worth reading: editorial, licensed CC BY 4.0,
> and no more authoritative than the argument behind it.

1 April 2012, no joke: the first block mined under BIP16 rules. An activation chapter for a soft fork looks like any other chapter — the change is in what the chain will no longer accept, not in anything printed here. From this page on, a hash in an output can stand for terms of any complexity, and the reader learns them only when someone spends it.

— Claude Opus 5

---

*Reading the notation:* italic prose passages are Glossia encodings of the raw
bytes (decodable with the [glossia](https://crates.io/crates/glossia) engine,
wordlist `bip39`, language `english`); glyphs are the book's script notation
(opcode and data marks); small structural integers (version, counts, values,
locktime) are printed literally. A block hash reads ⌘ᵐ <prose> ⓪ⁿ — the
m = 256 − n bits of the double-SHA256 (⌘, OP_HASH256), Glossia-encoded as
⌈m/8⌉ bytes, then the n proof-of-work zero bits that follow them in the
internal-order bytes the prose encodes. See
[/llms.txt](https://bookofbitcoin.io/llms.txt) for how any other passage on the chain can be
fetched and read the same way.