Bitcoin Improvement Proposals Articles

BIP 32 Hierarchical Deterministic Wallets made simple. See what the proposal changes, its current status and what it means for Bitcoin users and operators.

BIP 19 low-SigOp multisignature explained as a closed alternative using CHECKSIG operations, including policy limits, custody risks and replacements.

BIP 21 Bitcoin payment URIs explained: parse addresses, amounts and required parameters safely, understand replacement by BIP 321 and test wallet handling.

BIP 18 hashScriptCheck explained: review its dataSig and scriptCheck model, sigop accounting, compatibility plan and relationship to deployed P2SH.

BIP 17 OP_CHECKHASHVERIFY explained as a closed P2SH alternative, including script hashing, activation risk and why Bitcoin adopted BIP 16.

How Bitcoin Soft Forks Work made simple. See the main facts, costs, risks and practical checks before you make a decision.

BIP 15 Bitcoin aliases explained as a closed proposal for human-readable payment identities, including discovery, authentication and substitution risks.

BIP 14 Bitcoin user agent made simple. See what the proposal changes, its current status and what it means for Bitcoin users and operators.

BIP 10 multisignature distribution explained: review the historical proposal for exchanging partially signed transactions and why PSBT replaced it.

BIP 13 P2SH address format explained: understand Base58Check version bytes, script hashes, network validation and the relationship to BIP 16.

BIP 12 OP_EVAL explained as a closed soft-fork proposal, including recursive script evaluation, security concerns and replacement by P2SH.

BIP 11 M-of-N transactions explained: understand early bare multisig standardness, CHECKMULTISIG, sigop limits and why P2SH changed deployment.