[{"type":"report","id":"BLC-STUDY-1699","title":"OP_TWEAKADD - x-only key tweak addition","author":[{"literal":"Jeremy Rubin"}],"issued":{"date-parts":[[2026]]},"publisher":"Jeremy Rubin","URL":"https://github.com/bitcoin/bips/blob/master/bip-0449.md","note":"Rights status: Licensed for redistribution. Not a licence to republish the paper."}]