{"document_id":"BLC-STUDY-0198","slug":"bip141","title":"Segregated Witness","authors":"Eric Lombrozo, Johnson Lau and Pieter Wuille","year":2015,"date_label":"2015","publisher":"Eric Lombrozo, Johnson Lau and Pieter Wuille","paper_type":"Design paper","category":"Scaling","topics":["Scaling"],"source_url":"https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki","source_label":"BIP 141","legacy_pdf_path":null,"sha256":null,"sha256_note":"No hash is published. This build does not store those PDF bytes, so a checksum would be invented. Where a legacy path exists, it points at the Internet Archive copy of the old library.","version":"Source cited by the 2015 study. The study is the reading. This page does not add a second essay.","doi":null,"rights_status":"Licensed for redistribution","source_status":"Official source","use_status":"The upstream file is mirrored at /primary/bip141.md under PD. The canonical file remains the source URL. The desk study is separate.","licence":"PD","licence_label":"PD","full_text":"https://blockchainlab.com/primary/bip141.md","full_text_reason":"Mirrored from the upstream file under PD. Desk wording is not part of that licence and is not a training grant.","repository":"https://github.com/bitcoin/bips","editorial_line":"Move witness data outside the input script. The transaction id that contracts depend on no longer covers the witness. A new weight limit counts witness bytes less than base bytes.","canonical_url":"https://blockchainlab.com/whitepaper/bip141","record_url":"https://blockchainlab.com/research/corpus/papers/bip141","study_url":"https://blockchainlab.com/whitepaper/bip141","last_reviewed":"2026-10-01","last_checked":"2026-10-01","relationships":[{"rel":"Canonical reading","label":"BIP 141 study","href":"/whitepaper/bip141"},{"rel":"Related paper","label":"Taproot","href":"/whitepaper/taproot"},{"rel":"Related paper","label":"Lightning","href":"/whitepaper/lightning"}]}