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Untangling Knots vs. Core
The Bitcoin Brief

Untangling Knots vs. Core

October 4, 2025 · 01:23:06 · Max BBB, Bitcoin QnA
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Welcome to The Bitcoin Brief and show setup
Hosts reconnect: school run, kids and explaining Q
Travel plans: Madrid and Watch Out Bitcoin conference
Why are Spanish Bitcoiners so privacy-forward?
Personal updates and tee-up of the Core vs Knots debate
Setting biases and framing the Core vs Knots discussion
Leaked DMs: Luke Dashjr, CSAM filters and a potential hard fork
Multisig committee idea, ZK-proofs and slippery slopes
Would this create a hard fork? Validity and data removal risks
How we got here: inscriptions, ordinals and embedding data
UTXO set bloat, node costs and hardware considerations
Op_return policy changes in Bitcoin Core v0.30
Are filters effective? Miner deals, fee estimation and centralisation
Dust limits, spam filters and their limits
What is ‘spam’? Competing definitions and incentives
Censorship resistance vs network integrity
Core’s rationale: steer data to pruneable op_return
Reality check: you can’t stop meta-protocols
Witness discount incentives vs op_return and UTXO growth
Sympathies, analogies and calls for nicer discourse
News: Canada seizes TradeOgre customer funds – not your keys
Boosts and community banter
Weekly question: P2P exchange privacy, banks and risks
Practical advice: when P2P, when exchanges, and gift cards
Updates: Peach, Fulcrum 2.0, usage stats and more
Miniscript in the wild: Liana RC2 and Nunchuk Zen HODL
Mostro v1: Nostr-native P2P trading app
Ark and Spark reading list; closing notes and travel

Chapters

Show Notes

In this episode of The Bitcoin Brief, Max and Q delve into the latest happenings in the world of Bitcoin and privacy.

In this Bitcoin Brief, Q and Max dive into the escalating Core vs. Knots debate, sparked by leaked DMs suggesting a potential hard fork proposal from Luke Dashjr to address CSAM-related concerns via a trusted multisig and ZK proofs. We unpack why leaking private messages is a bad precedent, the slippery-slope risks of any centralised arbiter of “bad data,” and how such a scheme could fracture consensus and even create a hard fork. From there, we lay out both sides: Core’s view that fees are the real spam filter and that relaxing/removing the OP_RETURN relay limit nudges non‑monetary protocols toward a less harmful data path; and Knots’ view that node-level filters express sovereignty, reduce bloat, and protect network integrity. We also explore why spam is subjective, why whack‑a‑mole filtering doesn’t work against out‑of‑band miner deals, and the economic incentives that may still push data into discounted witness space despite OP_RETURN becoming more permissive.

They present a pragmatic take on peer‑to‑peer exchanges like Peach and RoboSats: they improve personal privacy versus centralised KYC, but they’re not magic cloaks against governments or banks—use them thoughtfully, consider dedicated accounts, and prefer gift cards for day‑to‑day fiat spend. Rounding out the brief are updates: Peach adding buy‑side offers; Fulcrum v2.0 improving database reliability; Liana RC2 and Nunchuk’s new Miniscript templates (including time‑locks—use with care); and the Mostro v1 mobile app for Nostr‑native P2P trading. We close with notes on Ark developments from Bull Bitcoin and a deep dive piece on Ark and Spark channel factories.

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