Research group proposes soft-fork-free quantum-resistant Bitcoin layer as Coinbase sets custodian terms
Coinbase published custodian requirements for a quantum-resistant Bitcoin transition while a research group proposed verifying post-quantum signatures at the peer-to-peer layer, with no soft fork.
Why it matters
Any transition would fall on the wallet developers, node operators, miners and large custodians named in Coinbase's post, and Coinbase says that work runs for years. Nothing in the evidence sets a deadline, reports an attack on Bitcoin's signatures or ties either proposal to a price.
Where the sources disagree
Buterin's description of the split between compute capex and electricity in Bitcoin mining costs
46%
CoinGape
76%
Crypto.News
Buterin's own summary calls the split roughly 50/50, while the detailed table reported by CoinGape and Crypto.News puts electricity at 45.9% and compute capex at about 40%.
Whether Bitcoin's quantum-resistant transition requires a soft fork
No soft fork needed, verification moved to the peer-to-peer layer
Crypto News (CryptoNews.net)
BIP-360 would create a Pay-to-Merkle-Root output through a soft fork
Unchained
Crypto News describes a framework that avoids any consensus change by verifying at the peer-to-peer layer, while Unchained describes the BIP-360 route Coinbase points to as a soft fork that drops Taproot's key path.
Figures that do not reconcile
Found by comparing the numbers in the reports automatically. They are differences, not yet confirmed to be about the same thing.
reported cost
$93,700
CoinGape
$40,600
Crypto.News
CoinGape reports $93,700, Crypto.News reports $40,600 (57% apart).
Key facts
Coinbase published requirements for Bitcoin's move to quantum-resistant signatures and described the post as an input to an open discussion, not a final Coinbase position.
Reported by Unchained
Coinbase holds roughly 5% of all BTC in existence by its own count, and Crypto News reported the same share as about 5% of the BTC supply.
5 %Reported by Unchained
Coinbase says preparation should start well ahead of any cryptographically relevant quantum computer announcement and that consensus-rule changes plus the migrations that follow can take years.
Reported by Unchained
Coinbase favours an output type that allows post-quantum schemes to be added or replaced later, citing BIP-360, which Unchained describes as a soft fork creating a Pay-to-Merkle-Root output by dropping Taproot's key path, plus a P2TRv2 design and a 1-of-2 hybrid of classical and post-quantum keys.
Disputed figureReported by Unchained
Crypto News reported that a research group proposed Compact Shielded Client-Side Validation, verifying post-quantum keys, transaction histories and proofs at the peer-to-peer layer so no consensus change is needed, with users installing compatible client software.
Disputed figureReported by Crypto News (CryptoNews.net)
Bitcoinist reported that Bitcoin faces no imminent quantum-computing emergency, that present machines cannot carry out such attacks at practical scale, and that changes need broad acceptance across wallet providers, node operators and miners, with coins in older wallet types a specific problem.
Reported by Bitcoinist
Vitalik Buterin's Oct. 17 cost tables put Bitcoin mining electricity at $43,000 per BTC, or 45.9% of the listed cost of about $93,700, with $40,600 of that coming directly from electricity supplied to computers.
45.9 %Disputed figureReported by CoinGape
The same tables put computing capital expenditure at roughly 76% of AI inference costs, and CoinGape reported AI inference power at under 5%.
76 %Disputed figureReported by CoinGape
What happened
Coinbase set out what it wants from Bitcoin's shift to signatures that resist a future quantum computer, describing the post as an input to an open discussion rather than a final Coinbase position, and said work should begin well ahead of any cryptographically relevant quantum computer announcement, which Unchained defines as a machine able to derive private keys from exposed public keys. By its own count Coinbase holds roughly 5% of all BTC in existence, and Crypto News reported the same share as about 5% of the BTC supply. Coinbase said changes to Bitcoin's consensus rules and the migrations that follow can take years, and it favours an output type that lets post-quantum schemes be added or replaced later, pointing to BIP-360, which Unchained describes as a soft fork creating a Pay-to-Merkle-Root output by dropping Taproot's key path, alongside a P2TRv2 design and a 1-of-2 hybrid letting coins be spent with a classical ECDSA or Schnorr key or a post-quantum key. Only Crypto News reported a research group's proposal, Compact Shielded Client-Side Validation, which checks post-quantum keys, transaction histories and proofs at the peer-to-peer level so no consensus change is needed, and which still asks users to install compatible client software. The two routes do not agree on whether a soft fork is avoidable, and Bitcoinist reported that Bitcoin faces no imminent quantum emergency, that today's machines cannot mount such attacks at practical scale, and that dormant coins in older wallets plus acceptance across wallets, node operators and miners are the harder problems. A separate thread in the same set has Vitalik Buterin posting cost tables on Oct. 17 that put electricity at 45.9% of listed Bitcoin mining cost per BTC, about $43,000 according to Crypto.News, while computing capital expenditure accounts for roughly 76% of AI inference cost, which CoinGape also covered, along with examples such as Core Scientific's AMD work, MARA's $168M EDF deal and Anthropic's 20-year TeraWulf lease.
How the story developed
- First report
First report by Crypto News (CryptoNews.net)
Quantum-Resistant Bitcoin Just Arrived – And It Doesn’t Need a Soft Fork
- Update
Research group's Compact Shielded Client-Side Validation framework reported as a quantum-resistant layer needing no soft fork
Verification of post-quantum keys, transaction histories and proofs is moved to the peer-to-peer level; clients must run compatible software.
- Independent corroboration
Independently corroborated by Unchained
Bitcoin’s Quantum-Resistant Upgrade Has to Work for Big Custodians, Coinbase Tells Developers
- Official statement
Coinbase publishes custodian requirements for a quantum-resistant Bitcoin transition
Coinbase calls the post an input to an open discussion, says work should begin before any cryptographically relevant quantum computer exists, and says the migration can take years.
- Update
Vitalik Buterin posts Bitcoin mining and AI inference cost tables on X
The tables put electricity at 45.9% of listed mining cost per BTC against about 76% computing capex for AI inference.
- Update
Crypto.News corroborates the cost tables and breaks out the second electricity line
It reports $2,400, or 2.6%, of additional electricity cost alongside $40,600 supplied directly to computers.
- Update
Bitcoinist follows up on the coordination problem and coins held in older wallet types
The report says today's machines cannot mount quantum attacks at practical scale and that any change needs wallet, node and miner acceptance.
How coverage built up
Independent sources over time, counted the way the consensus panel counts them: a republication of a wire story does not move the line.
- 14 Oct 2026, 01:55 UTC: Crypto News (CryptoNews.net) — 1 independent source, 1 reports
- 14 Oct 2026, 10:32 UTC: Unchained — 2 independent sources, 2 reports
- 14 Oct 2026, 11:47 UTC: Crypto News (CryptoNews.net) — 3 independent sources, 3 reports
- 17 Oct 2026, 08:50 UTC: CoinGape — 4 independent sources, 4 reports
- 17 Oct 2026, 08:57 UTC: Crypto.News — 5 independent sources, 5 reports
- 17 Oct 2026, 10:43 UTC: Bitcoinist — 6 independent sources, 6 reports
- 19 Oct 2026, 12:09 UTC: BTC-ECHO — 7 independent sources, 7 reports
Affected entities
Also mentioned: Cardano, VanEck
Original sources
| Publisher | Report | Role | Published |
|---|---|---|---|
| Crypto News (CryptoNews.net) Aggregator | Quantum-Resistant Bitcoin Just Arrived – And It Doesn’t Need a Soft Fork | Original | |
| Unchained Crypto media | Bitcoin’s Quantum-Resistant Upgrade Has to Work for Big Custodians, Coinbase Tells Developers | Independent | |
| BTC-ECHO Crypto media | Bitcoin-Mining wird immer teurer: Schnappt die KI den Minern den Strom weg? | Independent | |
| Crypto.News Crypto media | Vitalik Buterin contrasts Bitcoin’s power costs with AI’s 76% capital share | Independent | |
| CoinGape Crypto media | ETH Co-Founder Vitalik Breaks Down Bitcoin vs AI Compute Cost Structure | Independent | |
| Bitcoinist Crypto media | Coinbase Warns Bitcoin Must Prepare For Quantum Computing Before It’s Too Late | Independent | |
| Crypto News (CryptoNews.net) Aggregator | A Major Quantum Threat is Approaching for Bitcoin! Coinbase Issues Urgent Call! | Syndicated |
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