# BIP65 activation (v4)

> A passage of **The βook of βitcoin** — the Bitcoin chain read as a book. This is
> block 388,381 read as a chapter, and its transaction 1
> (of 784) 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:** II β89 ■974 §1 (Volume II, Book 89, Chapter 974, section 1)
- **Block:** 388,381 — BIP65 activation (v4)
- **Block hash:** `000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0`
- **Transaction id:** `8b6f7958d15e6ec35b1afb90132808c306c4957d8de6f5b72024805360291ec3`
- **Read live:** https://bookofbitcoin.io/bitcoin-book.html?txid=8b6f7958d15e6ec35b1afb90132808c306c4957d8de6f5b72024805360291ec3

## Chapter frontispiece — block 388,381

Block hash, as prose: ⌘¹⁸⁷ *Abuse may see acid like fade to supreme. Push get soul over machine. Suspect lesson wagon to bag. Fever desert jeans out pig. Sir replace an awake abandon.* ⓪⁶⁹

- **version:** v4 — block version 4 (0x00000004) — pre-BIP9 integer form
- **previous block:** ⌘¹⁸⁸ Abuse out account guide. Web due see biology. Fatigue undo a process. Its intact menu rotate to moon. Scorpion kid ankle per its vague opinion. Yes manage scare to divorce. ⓪⁶⁸
  - hex: `000000000000000009f886db2c7c12a497603e86378bace3ead93d350be3f38c`
- **merkle root:** ⋔ Abandon access injury to flame per boat. Kick promote kid to a fiction. Find out get ecology. Feel may see a crucial yes. Ear adjust our very shock. Its obvious math stomach trade. Song club the question. Our elite pan are dumb.
  - hex: `1f02125fc392e79ac71a89c594f1e539301a53c1a856ae925e58a3670c61854e`
- **timestamp:** 2015-12-14 17:24 UTC
- **difficulty target:** β₆₈ < 910927×256²¹ — the block hash above reads below this target — nBits 180de64f — mantissa 910927 (97·9391) shifted up 21 bytes: the target 00000000000000000de64f000000000000000000000000000000000000000000, which a valid block hash must read below (68 leading zero bits) — difficulty 79,102,380,900 (relative to the genesis block)
- **nonce:** η 2³·5·79226183

## § 1 — BIP65 activation (v4)

Transaction id, as prose: ⌘²⁵⁶ *Abandon achieve body to medal. A scheme set day. Bamboo far see lizard. Wrong track hip to grace. A marine history get lottery. A park improve wild to some spot. The valid syrup are unfair. Our jet may promote toss to a vapor.*

- **version:** 1
- **input 1:** coinbase (∅ — no previous output; new coin)
  - script: ■388381“/BIP100/” An abstract absurd carry tie. Cop learn syrup to gauge. Life scare door per pelican. Pop expand access to abandon. Hybrid may see set for die. “/BTCC/ ”
  - sequence: ■0 — replaceable; relative locktime 0 blocks after the input's confirmation
- **output 1:** 25.15227937 ₿
  - script: ⧉ ⌖ h²⁰ Absurd abuse ghost to claim. Sky may fetch short out sleep. A peace may fall elder. A tax is typical. Feed truly educate will. The notable scale may see hit. ≡ ∇
- **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.

CHECKLOCKTIMEVERIFY: from December 2015 an output can refuse to be spent before a stated time or height. The book draws it τ. It is the first opcode that constrains when a coin may move rather than who may move it, and the delay-based designs that followed — escrows, vaults, payment channels — are built on it.

— Claude Fable 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.