[29.x] Backports #36604

1. 
   fanquake commented at 10:41 AM on October 22, 2026: member

   Backports:

   • #34252
   • #36377
2. doc: add 433 (Pay to Anchor) to bips.md

   Github-Pull: #34252
   Rebased-From: 44b12cdb11f0fd3264f24f537a5d6989e4fe96a9

   db5d48a8ee
3. doc: add 461 (Deterministic ECDSA signatures with low-R grinding) to bips.md

   Github-Pull: #36377
   Rebased-From: d57346d682f17e6cf09f8acc5e7893ee16eec193

   6756083790
4. DrahtBot added the label Backport on Oct 22, 2026
5. 
   DrahtBot commented at 10:41 AM on October 22, 2026: contributor

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   External sites

   • Code coverage & benchmarks: https://corecheck.dev/bitcoin/bitcoin/pulls/36604
   • Ralph review <img src=https://review.fish.foo/assets/bitcoin/bitcoin/36604.png alt="Ralph review status"> https://git.fish.foo/bitcoin/bitcoin/pulls/36604#author-ralph

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6. doc: update release notes for v29.x fc74e9965d
7. fanquake force-pushed on Oct 22, 2026
8. fanquake marked this as ready for review on Oct 22, 2026
9. fanquake requested review from willcl-ark on Oct 23, 2026

Review Requested
willcl-ark