Bitcoin Ubuntu 🧡⚡🇿🇦

Bitcoin-only education // @MyFirstBitcoin_ Light node // Support at CBAF // Building @PoW_checkbot

[Bitcoin Ubuntu 🧡⚡🇿🇦 @BitcoinUbuntu]

New phone, who dis?

Same PoWBoT stats, brand new look.
Now with a light mode.

https://t.co/Qt3g3Gh1oi

[PoWBoT @PoW_Checkbot]

New phone, who dis?

Same PoWBoT stats, brand new look.
Now with a light mode.

https://t.co/m4usv4wkeS

[Steve Weis @sweis]

CLAUDE FOUND THE SEEDS
https://t.co/m8N6OPQoCQ

[Bitcoin Ekasi @BitcoinEkasi]

Have you ever looked at a Bitcoin Circular Economy project posting about adoption on X, and wondered:

"Is this even real?"

Well, so have we.

Which is why, since early 2025, we've been working on something that helps to answer that question.

https://t.co/WI1keI5shi

Built by @BitcoinUbuntu, the @PoW_Checkbot is a Real-Time Automated Proof-of-Work Verification system for Bitcoin Circular Economy projects.

It's built to remove some trust, by giving projects the opportunity to verify that the adoption they claim, is in fact real.

Go check it out!
https://t.co/WI1keI5shi

[Saifedean Ammous @saifedean]

🟠💊NEW!! 🟠💊

I am launching a free online course based on The Bitcoin Standard starting today on my podcast and Youtube channel!

Watch the first lecture now and be sure to subscribe to get all the lectures over the coming weeks!

[SİYAH SANCAK @siyahsancakx]

⚪️ #SONDAKİKA | İNTERPOL tarafından kırmızı bültenle aranan “Balina James” bu sabah şafak operasyonuyla MİT ve Özel Harekat tarafından yakalandı.

➖Richard James Schueler isimli şahsın evinden değeri 500.000.000 TL’nin üzerinde para ve kişisel eşya çıktı.

[Bitcoin Optech @bitcoinoptech]

Clara Shikhelman (@ClaraShik) and Elias Rohrer (@_tnull) joined Optech to discuss Newsletter #426:

News
● Dynamic one-byte message type IDs for BIP324 (45:02)
● Discussion of conventions for tagged hash tags in BIPs (49:04)
● Proposal for onchain, private bitcoin transfers with no consensus changes (1:15)

Releases and release candidates
● Bitcoin Core 32.0rc3 (53:34)

● Core Lightning 26.06.9 (54:38)
● LDK v0.3-rc3 (23:38)
● LDK v0.2.7 (24:33)
● BTCPay Server 2.4.5 (56:55)

Notable code and documentation changes
● Bitcoin Core #36277 (59:51)
● Bitcoin Core #36365 (1:05:09)
● Bitcoin Core #36338 (1:07:53)
● Bitcoin Core #32895 (1:10:38)
● Core Lightning #9582 (1:12:38)
● Eclair #3390 (1:18:03)
● LDK #5057 (33:00)
● LDK #5042 (35:55)
● LDK #5046 (38:25)
● LDK #5028 (41:43)
● LND #11290 (1:20:41)

[The Orange Sun @OrangeSunSpaces]

https://t.co/SgprrIDNrT

[Sani | TimechainIndex.com @TimechainIndex]

New on https://t.co/j7c87xL0zM: interactive Bitcoin transaction flow charts.
Explore inputs, outputs, labels and UTXO ages, with fullscreen navigation, live search, zoom and high-resolution exports.

Coming next: an address & transaction tracer.

[Core Lightning ⚡️ @Core_LN]

Core Lightning 26.06.9 is out. Upgrade now.

It fixes a newly reported vulnerability that can lead to loss of funds. Nodes running 26.06.8 or earlier are affected.

Verify the signatures and install it as soon as possible.

https://t.co/3Sj5Y8WX6F

[Bitcoin Ubuntu 🧡⚡🇿🇦 @BitcoinUbuntu]

@singularety Yes, thanks for the suggestion! We'll add it to our list for future merchant stats.

Here are today's numbers: 95 of Epoch 4's 207 shops came back with approved posts in Epoch 5 (46%). Of the 61 new shops in Epoch 5, 30 are back in Epoch 6 (49%), with about two weeks still to go.

[Bitcoin Ubuntu 🧡⚡🇿🇦 @BitcoinUbuntu]

New phone, who dis?

Same PoWBoT stats, brand new look.
Now with a light mode.

https://t.co/Qt3g3Gh1oi

[PoWBoT @PoW_Checkbot]

New phone, who dis?

Same PoWBoT stats, brand new look.
Now with a light mode.

https://t.co/m4usv4wkeS

[Bit Fitness @BitFitness21M]

🟠TOMORROW 14 DAYS TO 21K

We’re running 21K. You’re doing 21 minutes. We’re doing it together.

Oct 4–17: 14-day countdown
Oct 18: 🏃 21.1K Race Day
Oct 19–24: 🟠 6-day post-race community challenge

DAY 1: Oct 4

START

BitFitness: Easy run/walk + mobility
Community: 21-minute walk

Don’t try to change your life in one day. Just move for 21 minutes.

Kindly share Proof for weekly sats rewards 💪🧡

Stay tuned for DAY 2, daily updates and thoughts.

Please Like, Repost and tag a partner to journey with. 🙏🧡

[Blink Wallet @blinkbtc]

Full post-mortem of the September 19 attack, and a 50% bounty — up to 3.3 BTC — on the stolen funds:
https://t.co/8iRFY7Q13G

Bounty terms:
https://t.co/aF8d2L29Kv

On Saturday September 19 an attacker used a flaw in our admin tools to take over 35 Blink accounts and withdraw about 6.61 BTC from 24 of them. A customer called one of our engineers at 11:39 UTC. Fifteen minutes later the whole custodial service was off. By that evening the hole was closed and the service was back. By Thursday September 24 every affected customer had their exact balance back, in bitcoin and in dollars, paid for by Blink's shareholders. No customer bears any loss.

This was our fault. Not Bitcoin's, not our users'. To the 22 customers whose bitcoin was taken, and to the 3,817 people whose account details were looked up: we are sorry.

How it happened:

From October 2023 until that Saturday, anyone with a free Blink account and a web browser could give themselves the powers of our support staff: change the email or phone on any account, log in as that customer, raise their limits. Three unremarkable mistakes in how our admin tools checked permissions, stacked on top of each other, in code we inherited.

The whole team was busy moving tens of thousands of users to self-custody under new regulation. Monitoring built to catch outages didn't catch an administrator doing things no administrator should.

What it didn't touch:

The money came out of our hot wallet. Most customer funds sit in multi-signature cold storage that nothing in our admin tools can reach. Non-custodial accounts were never in play: we don't hold those keys.

What the attacker saw:

They also read the details of 3,817 other accounts, in some cases a phone number or email address. Not names, not IDs, not addresses, not passwords, not seed phrases. We wrote to every holder we could reach, saying exactly what was seen.

What stopped them:

Two-factor authentication. The attacker logged in to nine accounts that had it on and tried eighteen times to move money. Zero loss.

None of the 24 drained accounts had it on. If you take one thing from this post: Settings → Security and Privacy → Two-factor authentication. Then turn it on for your email too.

What we changed:

The flaw was fixed the same day and a third layer added two days later. The admin tools are off the public internet. The functions that change a customer's email or phone are switched off for everyone while we redesign them. All customer API keys were revoked.

The hot wallet now holds a fraction of what it did. Security fixes are developed privately and published once deployed; the code stays open source. A standing security reporting channel is live, with rewards of up to 0.1 BTC for critical findings.

Where the money is:

Some still sits where it was withdrawn to. About 5 BTC has gone through a cross-chain swap service; a small amount reached an exchange that is cooperating.

Criminal complaints are filed in El Salvador and Próspera, the regulators are notified, and we have traced the funds continuously. We are not expecting the money back.

So we are putting a 50% bounty on it.

Whoever provides the information that leads to a recovery gets 25% of what is recovered. Another 25% of anything recovered goes to Bitcoin Beach, Bitcoin Ekasi, Afribit Kibera and the circular economies they choose. No cap, no end date, paid only out of funds that actually come back. Write to [email protected].

We would far rather have spent this money on grassroots Bitcoin adoption than lost it to a thief. Shame on the attacker.

One more thing:

Ignore any email or SMS about this incident that contains a link: we contacted affected users only through messages in the Blink app. We will never ask for your PIN, password, seed phrase or a login code.

The full post-mortem has the timeline, the technical detail for anyone running code derived from ours, and the bounty terms (links at the top).

[EntropyLab @EntropyLabX]

https://t.co/5gna8a7Jp1

[EntropyLab @EntropyLabX]

EntropyLab’s first release candidate, v1.0.0rc1, is here. 🪨

A Bitcoin key and wallet calculator in one HTML file. You bring your own entropy; it does the math offline.

Download, verify, disconnect. Send feedback:
https://t.co/MuhXQ2KIyM

[Calabar Bitcoin Club @BitcoinCalabar]

Real room. Real Bitcoin. Real signal.

Bitcoin Masterclass Cohort V
8th • 9th • 10th October | 2pm
📍 Bitcoiner’s Hub, 38 MCC Road, Calabar

Bitcoin Calabar × @TrezorAcademy

Only the serious ones show up.
You in?

https://t.co/hUCFdfOFbT

[Blockstream @Blockstream]

Core Lightning node runners, this is urgent, upgrade to 26.06.8 now if you haven't already.

[Bitcoin Ubuntu 🧡⚡🇿🇦 @BitcoinUbuntu]

New phone, who dis?

Same PoWBoT stats, brand new look.
Now with a light mode.

https://t.co/Qt3g3Gh1oi

[Bitcoin Ubuntu 🧡⚡🇿🇦 @BitcoinUbuntu]

https://t.co/xRWH1JYpsz

[Bitcoin Ubuntu 🧡⚡🇿🇦 @BitcoinUbuntu]

@NathanM55811714 @OrangeSunSpaces Thanks, I think it was https://t.co/L7gSdsUDkt

[PoWBoT @PoW_Checkbot]

New phone, who dis?

Same PoWBoT stats, brand new look.
Now with a light mode.

https://t.co/m4usv4wkeS