Ciro Santilli @cirosantilli 37

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Cool data embedded in the Bitcoin blockchain / Interesting transactions Updated 2025-07-16

This is about transactions that are interesting not because of their inscriptions, but for some other reason, such as transaction size, etc.

github.com/kristovatlas/interesting-bitcoin-data

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Cool data embedded in the Bitcoin blockchain / IRC log dumps Updated 2025-07-16

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tx 210000d1392bec2505d1289e5c39c2039204ff1ecf7eef55f973ccd3111003e1, block 360235 (2015-06-10) and the following transactions have transcripts of a very long developer chat starting with:

jgarzik: if you aren't near one of the consulates there are some companies that will charge you money to do it...

TODO purpose? The transcripts are interspersed with developers likely voting for project leadership, and commenting on Gavin.

TODO find original discussion location, these are almost certainly from one of the Bitcoin IRC channels.

Part of the goal of this dump is that the Bitcoin developers have a policy of not allowing logging on their talk channel, and this released it all to the blockchain forever where it cannot be deleted. These might just be more of protests against larger block sizes.

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Coronavirus Updated 2025-07-16

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youtu.be/oCelMyMtRCk?t=167 mentions that they get their lipid layer from the Golgi complex of the host, where they replicate.

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Cool data embedded in the Bitcoin blockchain / Software Updated 2025-07-16

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GitHub is for newbs.

50002f38a40aeca96f7d03ceac1c62fc233b44207af99df8f1daddf03f6ef61c via cryptograffiti.info contains a Python script that starts with:

#!/usr/bin/env python3
#
# This file is placed in the public domain.
#
# CryptoGraffiti tool
#
# Requires python-bitcoinlib-v0.2.1
#
# https://github.com/petertodd/python-bitcoinlib
#
# pip install python-bitcoinlib

209c9106c7261582f5d0907819c6e10dea670c273133047d911be41f8a42d86f via cryptograffiti.info contains a Base64 encoded Python script starting in:
```
#!/usr/bin/env python
# brainwallet "base58"
# v2015-05-18, fixed Tor DNS problem
import binascii
import hashlib
```
Some related ones:
- 25658f625c8f3964593b9e3c632040cb69aea9cf24403af33ab173d7cba7c42f
- 7d188bd499137b5a0d68271ef8a4f3c4dc2f2b38bd03dfc913cb2b0be15b1e0d

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Cool data embedded in the Bitcoin blockchain / Technically interesting ordinal Updated 2025-07-16

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This section is about ordinals that are interesting primarily due to technical reasons linked to edge cases of the protocol.

Interesting MIME types:

ordinals.com/inscription/dad86d722156b8c384c1f3243e40aa7a0f6f5be496bc24e19485831584f9803fi0: mime type is an UTF-8 orange emoji "🟠"
ordinals.com/inscription/bc7b86245159cdf8bc63489687909f766a0a0e08279d23fb077cdd60ab1e9f22i0: mime type is an XSS attempt:
```
<script>alert('xss in content type')</script> tx=bc7b86245159cdf8bc63489687909f766a0a0e08279d23fb077cdd60ab1e9f22
```
ordinals.com/inscription/bc7b86245159cdf8bc63489687909f766a0a0e08279d23fb077cdd60ab1e9f22i0: mime type is "FuckYou"
ordinals.com/inscription/00b0ece72217ce49b637b3f9bf5335bc245e588568aa0676581b40c1bedc521di0: the mime is a long JSON. However, it does appear to be a valid feature as it rendered specially on ordinals.com.

Different ord markers:

71e85885522047240a9e70542145dbf2385e1bd468e6ac6002aa755422ea10f5 uses takingnames. Decode with:

bitcoin-core.cli decodescript "$(bitcoin-core.cli getrawtransaction 71e85885522047240a9e70542145dbf2385e1bd468e6ac6002aa755422ea10f5 true | jq -r '.vin[0].txinwitness[1]')" | jq -r .asm | sed 's/.* 0 //;s/ OP_ENDIF//;s/ //g' | xxd -r -p > 71e85885522047240a9e70542145dbf2385e1bd468e6ac6002aa755422ea10f5.png

gives the PNG of the wireframe draing of a washing machine with transparent background.

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Cool data embedded in the Bitcoin blockchain / The largest transactions in the Bitcoin Blockchain Updated 2025-07-16

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bitcoin.stackexchange.com/questions/11542/by-byte-size-and-number-of-inputs-outputs-what-are-the-largest-transactions-in/105384#105384

bb41a757f405890fb0f5856228e23b715702d714d59bf2b1feb70d8b2b4e3e08 999,657 bytes. Joins a bunch of tiny inputs into a single output
623463a2a8a949e0590ffe6b2fd3e4e1028b2b99c747e82e899da4485eb0b6be and 5143cf232576ae53e8991ca389334563f14ea7a7c507a3e081fbef2538c84f6e both have 3,075 outputs of 1 satoshi each and a single input. We were not able to identify any meaningful data in it, file just says data, and there aren't long ASCII strings. However, the outputs were unspent as of 2021, which suggests that they might actually be data.

Analysis of some of them follows.

dd9f6bbf80ab36b722ca95d93268667a3ea6938288e0d4cf0e7d2e28a7a91ab3 has 13107 with payload 256KB in size, but some of them at least have been spent: www.blockchain.com/btc/tx/dd9f6bbf80ab36b722ca95d93268667a3ea6938288e0d4cf0e7d2e28a7a91ab3 therefore it's not data. file says their payload is a DOS executable, but it must be a coincidence

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Cool data embedded in the Bitcoin blockchain / Trump Updated 2025-07-16

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There's a bit of both sides in the 2016 race:

tx 3aaae4adc68b3768e1a6029987f2aca2479818495c9aee6a86067710806e9c4f: "bEW Trump 2016! Stop the TPP!"
tx 202ceac7b3e7b990d1961fd2eab18ba5c80c99f10eacc783f14c53ebfdcaee00 "oEW Fuck Obama&Clinton Go Trump!!!!"
tx 53fcddaa69e79c0fdc4e2cd139bffef341a38d46bb653721d9adf42460b1afae "EW Trump will fail America, like all his businesses"
data/out/0433.txt:1752:EW FUCK Trump and his supporters. You ppl are the dumbest scum ever.
data/out/0435.txt:1904:EW TRUMP 2016 !!!!!!!!!!!!!!
data/out/0437.txt:1150:bjEW FuCk OfF TrUmP!
data/out/0439.txt:1017:EW trump will trample regulations justly
data/out/0443.txt:1281:L9,GOD EMPEROR TRUMP WINS THIRD TERM`7
data/out/0444.txt:2102:L99,TRUMPPPPPPPPPPPPPPP
data/out/0445.txt:311:L127,TRUMP WILL SAVE THE WORLD.
data/out/0445.txt:1257:EW Howard not Trump is the actual 45th president.
tx 2fb07a8f358d690d8717734a48e5daf0ef70ea2d0e3b7c88dace8a5818fcb168 "L299,Trump touched my no-no"
data/out/0457.txt:8677:EW All of the sheep think Donald Trump is literally Hitler.
data/out/0481.txt:11481:I kill donald trump!!!!!!
data/out/0545.txt:1239:}fEW fuck donald trump
tx 05fce37228c732f4635f79e6f36d028be677404beab497ddace9024fe8e4b517 "EW Heil Trump!He's the true white leader our race need so much since Adolf"
data/out/0552.txt:14:Trump needs to get impeached and locked up!
data/out/0666.txt:56:(Trump was impeached for the second time in office.

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Cool person Updated 2025-07-16

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Country Updated 2025-07-16

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We shouldn't have countries.

We should have one big global government, with one global language that everyone can speak, and slightly different local laws, so you can choose where to live based on the laws you approve of the most.

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Course: Quantum Many-Body Physics in Condensed Matter by Luis Gregorio Dias (2020) Updated 2025-07-16

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www.youtube.com/playlist?list=PL6FyrZIBwD8LMWizZW1FUN2dS_l44yuiy

Affiliation: University of São Paulo.

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Coursera Updated 2025-07-16

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Some courses at least allow you to see material for free, e.g.: www.coursera.org/learn/quantum-optics-single-photon/lecture/UYjLu/1-1-canonical-quantization. Lots of video focus as usual for MOOCs.

Some are paywalled: www.coursera.org/learn/theory-of-angular-momentum?specialization=quantum-mechanics-for-engineers

It is extremely hard to find the course materials without enrolling, even if enrolling for free! By trying to make money, they make their website shit.

The comment section does have a lot of activity: www.coursera.org/learn/statistical-mechanics/discussions/weeks/2! Nice. And works like a proper issue tracker. But it is also very hidden.

November 2023 topics: