# The twice-confirmed coinbases — second printing > A passage of **The βook of βitcoin** — the Bitcoin chain read as a book. This is > block 91,880 read as a chapter, and its transaction 1 > (of 2) 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 β46 ■1161 §1 (Volume I, Book 46, Chapter 1161, section 1) - **Block:** 91,880 — The twice-confirmed coinbases — second printing - **Block hash:** `00000000000743f190a18c5577a3c2d2a1f610ae9601ac046a38084ccb7cd721` - **Transaction id:** `e3bf3d07d4b0375638d5f1db5255fe07ba2c4cb067cd81b84ee974b6585fb468` - **Read live:** https://bookofbitcoin.io/bitcoin-book.html?txid=e3bf3d07d4b0375638d5f1db5255fe07ba2c4cb067cd81b84ee974b6585fb468 ## Chapter frontispiece — block 91,880 Block hash, as prose: ⌘²¹¹ *Abstract not abuse attitude. Tennis may see notable to scene. Guy bring pool per night. Account rely its loud war. An unhappy brush is genuine. Miss set turkey to million. Tie may arrive detail per maid via hybrid.* ⓪⁴⁵ - **version:** v1 — block version 1 (0x00000001) — pre-BIP9 integer form - **previous block:** ⌘²¹¹ Our abstract see the acid panel to its slender guy. Our useful network far see quantum. A fragile series set cliff. Spoil occur gaze to hen. Flavor may see danger. Elevator enjoy the ear. Its wide pitch may set its bamboo to divorce via cow. ⓪⁴⁵ - hex: `000000000004099656bf4a3fda4db1b25630634afa2a201e975e4df9772df3f3` - **merkle root:** ⋔ Its abandon get an acid. Our nod embody to tag. Die may approve science. Head print to worry. Person ski a bright video via disorder. Rescue achieve tennis to banner. March see puppy out mail. Our wage can stick a grass. - hex: `2f6bf541621f43b8fa5012f976406ef7e379704859a3eeb72ad40e6c85740fe9` - **timestamp:** 2010-11-15 00:36 UTC - **difficulty target:** β₄₄ < 946774×256²⁴ — the block hash above reads below this target — nBits 1b0e7256 — mantissa 946774 (2·43·101·109) shifted up 24 bytes: the target 00000000000e7256000000000000000000000000000000000000000000000000, which a valid block hash must read below (44 leading zero bits) — difficulty 4,536 (relative to the genesis block) - **nonce:** η 2²·11·29·1187·1523 ## § 1 — The twice-confirmed coinbases — second printing Transaction id, as prose: ⌘²⁵⁶ *Abandon see accident to east for blind. Ramp guard the input. Cut may depend an awake sniff to diesel. Our basic floor parrot pop. A you. Son fetch fork to vault. The pay may prefer the better hunt. Its son ask to adjust. Some want may see the wise.* - **version:** 1 - **input 1:** coinbase (∅ — no previous output; new coin) - script: β₄₄ 946774×256²⁴ ⓪ - sequence: ● — final — disables the transaction locktime for this input - **output 1:** 50.00000000 ₿ - script: p⁶⁵ Abandon is absurd to calm. Its name is drastic via vocal. Our arctic set great. The false sky may smooth gold to call for capital. Fabric solve clutch to present. Step get each method. Another action see mystery. The metal ostrich winter velvet to rubber. Pizza may claw note out zone. Farm rebel a system. The set group prepare to open. Our rural peace is red. A you. Faint may see tuna to ceiling for clinic. Cluster donate to slim per hand. Jet is large to a far red. ∇ - **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. The only two transactions ever confirmed twice, each in four printings between them. Two miners running the same default configuration produced byte-identical coinbases, and nothing in the rules yet forbade it — so each second printing overwrote its first in the set of spendable outputs and destroyed that reward. The book prints all four, because all four were written. BIP30's ban on duplicate transaction ids switched on by timestamp (15 March 2012) rather than by flag block, with exactly these two offenders grandfathered forever: a rule that had to be written around the record instead of over it. BIP34 later closed the hole structurally — a coinbase must state its own height, so two blocks can no longer write the same one. Each printing owns its own page here. Pages count positions in the chain, not distinct transaction ids, so the book's page count runs exactly two past the chain's count of distinct transactions — and these are the two. — 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 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.