BIP143

E705720

Bitcoin Improvement Proposal

BIP143 is a Bitcoin Improvement Proposal that defines the new transaction digest algorithm used for signing Segregated Witness (SegWit) transactions.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (3)

Label	Occurrences
BIP143 canonical	1
BIP144	1
SIGHASH_ALL	1

How this entity was disambiguated

This entity first appeared as the object of triple T7899181 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: BIP143
Context triple: [Segregated Witness, specifiedIn, BIP143]

A. Segregated Witness
Segregated Witness is a Bitcoin protocol upgrade that separates signature data from transaction data to increase block capacity, improve scalability, and fix transaction malleability.
B. Pay-to-Witness-Script-Hash (P2WSH)
Pay-to-Witness-Script-Hash (P2WSH) is a Bitcoin output type that locks funds to the hash of a witness script, enabling complex, SegWit-based spending conditions with improved efficiency and malleability resistance.
C. P2PKH
P2PKH (Pay-to-PubKey-Hash) is a common Bitcoin transaction output type where funds are locked to the hash of a public key and can be spent by presenting the corresponding public key and a valid digital signature.
D. Bitcoin Script
Bitcoin Script is Bitcoin’s low-level, stack-based programming language used to define the conditions under which bitcoins can be spent.
E. BCP 39
BCP 39 is an IETF Best Current Practice document that provides guidelines and recommendations for the operation and management of the Internet Engineering Steering Group (IESG).
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: BIP143
Target entity description: BIP143 is a Bitcoin Improvement Proposal that defines the new transaction digest algorithm used for signing Segregated Witness (SegWit) transactions.

A. Segregated Witness
Segregated Witness is a Bitcoin protocol upgrade that separates signature data from transaction data to increase block capacity, improve scalability, and fix transaction malleability.
B. Pay-to-Witness-Script-Hash (P2WSH)
Pay-to-Witness-Script-Hash (P2WSH) is a Bitcoin output type that locks funds to the hash of a witness script, enabling complex, SegWit-based spending conditions with improved efficiency and malleability resistance.
C. P2PKH
P2PKH (Pay-to-PubKey-Hash) is a common Bitcoin transaction output type where funds are locked to the hash of a public key and can be spent by presenting the corresponding public key and a valid digital signature.
D. Bitcoin Script
Bitcoin Script is Bitcoin’s low-level, stack-based programming language used to define the conditions under which bitcoins can be spent.
E. BCP 39
BCP 39 is an IETF Best Current Practice document that provides guidelines and recommendations for the operation and management of the Internet Engineering Steering Group (IESG).
F. None of above. chosen

Statements (46)

Predicate	Object
instanceOf	Bitcoin Improvement Proposal ⓘ
activationMechanism	SegWit soft fork ⓘ
affects	script verification rules for SegWit inputs ⓘ
appliesTo	Segregated Witness transactions ⓘ version 0 witness program ⓘ
author	Johnson Lau ⓘ
backwardsCompatibility	non-SegWit transactions unaffected ⓘ
category	Consensus ⓘ
created	2016-02-02 ⓘ
defines	Segregated Witness (SegWit) signature hashing algorithm ⓘ linked to: Segregated Witness new transaction digest algorithm ⓘ
designGoal	compatibility with existing SIGHASH flags ⓘ deterministic and unambiguous signature digest ⓘ
documentType	technical specification ⓘ
doesNotChange	transaction serialization format for non-witness data ⓘ
fileName	bip-0143.mediawiki ⓘ
hashComponent	hashOutputs ⓘ hashSequence ⓘ
hashComponent	hashPrevouts ⓘ
improves	DoS resistance of signature verification ⓘ clarity of what is signed in a transaction ⓘ performance of multi-input transaction verification ⓘ
introduces	new digest calculation for signatures ⓘ
language	English ⓘ
motivation	fix quadratic hashing problem in legacy signature hashing ⓘ improve efficiency of signature verification ⓘ make hardware wallet implementation easier and safer ⓘ
network	Bitcoin ⓘ
proposalNumber	143 ⓘ
relatedTo	BIP141 ⓘ BIP144 ⓘ linked to: BIP143 Segregated Witness ⓘ
replaces	legacy SIGHASH algorithm for SegWit inputs ⓘ
repository	https://github.com/bitcoin/bips ⓘ
scope	signature hashing for SegWit inputs only ⓘ
securityProperty	reduces malleability for SegWit inputs ⓘ
signatureFlagSupport	SIGHASH_ALL ⓘ linked to: BIP143 SIGHASH_ANYONECANPAY ⓘ SIGHASH_NONE ⓘ SIGHASH_SINGLE ⓘ
standardizationScope	Bitcoin protocol consensus rules ⓘ
status	Final ⓘ
title	Transaction Signature Verification for Version 0 Witness Program ⓘ
usedBy	Bitcoin Core ⓘ hardware wallets supporting SegWit ⓘ
uses	double SHA256 for transaction digest ⓘ

How these facts were elicited

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Segregated Witness → specifiedIn → BIP143 ⓘ

BIP143 → relatedTo → BIP144 ⓘ

linked to: BIP143

BIP143 → signatureFlagSupport → SIGHASH_ALL ⓘ