Anthropic just raised thirty billion dollars at a three hundred and eighty billion dollar post-money valuation. Let that settle for a moment. Series G. Led by GIC and Coatue. Fourteen billion in annualised revenue, growing ten-x year on year for the past three years. This is the company that two weeks ago launched Opus 4.6, and which yesterday was quietly powering the agent I used to scrape the data for this very briefing. The valuation puts Anthropic comfortably in the territory of the most valuable private companies in history, which is a strange thing to say about a firm that publishes safety research and whose flagship product is, ultimately, a very good text predictor. But here we are, and the market has spoken with thirty billion reasons. The tension between yesterday's NBER study showing ninety percent of CEOs reporting zero measurable productivity impact from AI and a company growing at ten-x annually selling AI is not a contradiction — it's a phase transition. The revenue is real. The broad-based productivity gains aren't, yet. Anthropic is selling shovels during a gold rush where the gold might actually exist but nobody's figured out the mining technique.
Speaking of infrastructure that quietly holds the internet together, Let's Encrypt announced DNS-PERSIST-01 yesterday, and it's one of those proposals that sounds boring until you understand what it replaces. Currently, every time you renew a wildcard certificate — which happens every sixty to ninety days — your ACME client has to create a fresh DNS TXT record, wait for propagation, prove control, then clean up. This means DNS API credentials scattered throughout your infrastructure, automation pipelines that break when propagation is slow, and a general air of fragility around something that should be set-and-forget. DNS-PERSIST-01 flips this: you publish a single standing TXT record that says "this Let's Encrypt account is authorised to issue certificates for this domain," and it persists indefinitely. No more DNS writes in the critical path. No more credential distribution. The tradeoff is that protecting your ACME account key becomes more important since it's now the single point of authority, but that's a much more tractable security problem than securing DNS write credentials across an entire fleet. For anyone running IoT deployments, multi-tenant platforms, or anything at scale, this is a genuine quality-of-life improvement. The IETF draft is already published and Let's Encrypt is implementing it now.
Tailscale shipped Peer Relays to general availability, which solves an annoying problem in mesh networking. When two devices can't establish a direct WireGuard connection — corporate firewalls, strict cloud NATs, the usual suspects — traffic currently routes through Tailscale's DERP relay servers. Peer Relays lets you deploy your own relay nodes within your tailnet, keeping traffic on your infrastructure with better throughput. They've added static endpoint support for cloud environments where automatic discovery fails, which is the kind of pragmatic engineering that makes Tailscale feel like it was built by people who actually run infrastructure rather than people who write blog posts about running infrastructure.
Over in Bitcoin land, the Hourglass V2 debate on the mailing list is getting philosophically interesting. The proposal, for the uninitiated, addresses a specific quantum computing threat: Satoshi-era P2PK outputs — the oldest type of Bitcoin address where the public key is exposed directly on-chain rather than hidden behind a hash. If quantum computers ever break elliptic curve cryptography, these outputs would be immediately spendable by an attacker. Hourglass V2's solution is to rate-limit spends from P2PK outputs to one bitcoin per block, creating a kind of speed bump that slows any mass liquidation to a crawl. Jameson Lopp weighed in positively, noting it could complement his own quantum migration BIP which would let people prove ownership of old coins using zero-knowledge proofs of HD wallet derivation. But the pushback is sharp: Light argued Bitcoin "should not have an in-protocol plunge protection mechanism" and that artificially restricting anyone's ability to spend their coins undermines Bitcoin's core utility as peer-to-peer cash. This connects directly to Pieter Wuille's point from last week about shared cryptographic assumptions — the question isn't whether quantum computers will break secp256k1, it's what the social contract says we should do about coins that become vulnerable when they do. Mike Casey's response was pragmatic: the one-bitcoin-per-block limit is arbitrary but memetically powerful, and since most P2PK keys are almost certainly lost, the liquidation period would be extremely long regardless. It's a fascinating collision between Bitcoin-as-property-rights and Bitcoin-as-collective-security, and there's no clean answer.
Meanwhile on Delving Bitcoin, a new post on stateless VTXO verification landed, proposing to decouple custody from implementation-specific stacks. VTXOs — virtual transaction outputs — are a concept from Ark, a Layer 2 protocol that tries to solve Bitcoin's scalability problem differently from Lightning. The idea is that you can hold bitcoin in virtual outputs managed by an Ark service provider without the provider having custody, but current implementations tie verification to specific server software. Stateless verification would let any client verify their VTXO independently, which matters because if your Ark provider disappears, you need to be able to prove what you own and exit to the main chain. It's early, zero replies so far, but the direction is right — Bitcoin Layer 2 protocols need to be robust to operator failure, not just operator malice.
The UK economy is doing that thing where all the numbers are moving in the right direction and yet nothing feels right. Inflation dropped to three percent, which should be good news and prompted immediate speculation about early Bank of England rate cuts. But unemployment simultaneously hit five point two percent, a five-year high, and wage growth is slowing. Ground News tagged the inflation story at seventy-seven percent centre coverage from forty sources — remarkably non-partisan, because nobody disagrees that three percent is better than what came before. The unemployment story got only thirty-eight percent centre from twenty-six sources, which tells you the political framing is doing more work there. Labour is reportedly considering dropping its minimum wage pledge over youth joblessness fears, which, combined with Starmer's cascade of U-turns, paints a picture of a government that's discovering the difference between campaign promises and fiscal reality in real time.
The Epstein fallout continues to widen on the UK side. Beyond the Stansted flights story from yesterday, Ground News is now carrying a piece about the House of Lords coming under scrutiny — tagged as a right-wing blindspot with only three percent of coverage from right-leaning sources. The UN has weighed in too, suggesting Epstein's abuses may constitute crimes against humanity. Three hundred and four sources across the political spectrum. This story has moved from tabloid speculation to institutional reckoning, and the UK's political establishment is learning that proximity to Epstein is now a career-ending condition regardless of the actual nature of the relationship. Mandelson's position looks increasingly untenable.
On the fun side of the internet: someone at The Pudding built a comprehensive investigation into the chaos of women's clothing sizes, which hit 307 points on Hacker News. And a New Zealand startup achieved the world's first levitated magnet plasma confinement for fusion — a genuinely novel approach where the magnetic field is generated by a superconducting magnet floating inside the reactor vessel rather than by external coils. It's not going to power your house tomorrow, but the engineering is beautiful and the physics is sound.
Mempool remains a ghost town: two sat/vB for next-block, one sat/vB for everything else. Block height 937,331. Still the cheapest it's been in years. Consolidate, open channels, do your housekeeping.
[1] https://www.anthropic.com/news
[2] https://letsencrypt.org/2026/02/18/dns-persist-01.html
[3] https://tailscale.com/blog/peer-relays-ga
[4] https://gnusha.org/pi/bitcoindev/d8a38970-952d-4c8c-9ba5-2dfd79e70147n@googlegroups.com/
[5] https://delvingbitcoin.org/t/stateless-vtxo-verification-decoupling-custody-from-implementation-specific-stacks/2267
[6] https://ground.news/article/uk-inflation-falls-to-3-giving-hopes-of-early-cut-in-interest-rates_7ac1e7
[7] https://ground.news/article/uk-unemployment-rate-hits-five-year-high-of-52-as-wage-growth-slows
[8] https://ground.news/article/fallout-from-epstein-and-mandelson-puts-britains-house-of-lords-under-scrutiny
[9] https://pudding.cool/2026/02/womens-sizing/
[10] https://ground.news/article/new-zealand-startup-achieves-world-first-levitated-magnet-plasma-confinement_a89782
[11] https://bitcoinmagazine.com/news/ledn-sells-188m-bitcoin-backed-bonds