This website used to allow embedding text messages with OP_RETURN, here's an archive from 2015: web.archive.org/web/20150718052659/http://eternitywall.it/
As of January 2024, it seems to read-only mode, where it simply indexes matching transactions that were made via other means: web.archive.org/web/20230929075331/https://eternitywall.it/
A Reddit announcement from July 2015: www.reddit.com/r/Bitcoin/comments/3dxy9f/eternity_wall_messages_lasting_forever/
There were 3191 hits for the search term:in our data starting with tx a3b3af21514bd79a4cbcac9916a8514636a72d813539192214542fd85247082e (2015-06-24):up to the last entry on tx 28820bc14cf2cfda58ecbc9ac6df3f41a1cb90f4246543f01ba42a5e9dac3cf8 (2023-06-15)no doubt initials of 4 Chinesepeople. A blood brother oath comes to mind, akin to the Oath of the Peach Garden. Will these four be the ones to take down the evil dictator Xi Jinping?
git grep '\bEW 'EW Eternity wall is live
EW May our friendship endure, signed by hg, kty, wjj, and xyz.
The very first message gives away the name of what we assume is a web-based upload system, "EW" being its advertisement signature added to every message.
Running shows that the messages are encoded with OP_RETURN:
bitcoin-cli:bitcoin-core.cli getrawtransaction a3b3af21514bd79a4cbcac9916a8514636a72d813539192214542fd85247082e true "vout": [
{
"value": 0.00000000,
"n": 0,
"scriptPubKey": {
"asm": "OP_RETURN 455720457465726e6974792077616c6c206973206c697665The first currently known instance is as a link right during the prayer wars on block 142573 (2011-08-25) as the miner message:which redirects to www.youtube.com/watch?v=mGDuExhS6Nw&blockchain
Militant atheists, bit.ly/naNhG2 -- happy now?"
Around block block 246k (e.g. 27b7c526489dac8245747fa1c425a2e3eb07dea57b294eb4ae583fec9b859fcf, 2013-10-17) we note several transactions starting with a XML format followed by lyrics also base64 encoded as part of the XML metadata. Hidden surprises in the Bitcoin blockchain by Ken Shirriff (2014) was not able to identify the exact format either. At twitter.com/EMBII4U/status/1655831533750562816 EMBII mentions that this was part of an upload test.
<CG SZ="1156"><MG>... the first one being 0b4efe49ea1454020c4d51a163a93f726a20cd75ad50bb9ed0f4623c141a8008 As mentioned not very clearly at www.righto.com/2014/02/ascii-bernanke-wikileaks-photographs.html#ref12 the content of the first <MG><payload></MG> is a Base64 encoded stringCatagory: Poetry
Title: Never Gonna Give You Up
Performer: Rick Astley
Writer: Mike Stock, Matt Aitken, Pete Waterman
Label: RCA Recordstx d29c9c0e8e4d2a9790922af73f0b8d51f0bd4bb19940d9cf910ead8fbe85bc9b (2013-11-13) contains a plaintext Rickroll lyric in an output script via OP_RETURN.
tx 15b11e8d4e5b9425f024b381ba0cb7a54a35e52389bb4855f505772ce685b39c (2014-06-24): starting from this transaction, the lyrics were inscribed several times via input scripts. Then again:They were mega obnoxious!!! Who does this kind of crap for more than one year!!!
- 8bb9db70e24202fdfd0e48b57a11a407e6c8c0e76d879634b801b4345b8810b2
- b881afa519804a3c93a3c99481517ca8ae070b84c04e8e7a2bfb808e043f9771
- 70c8405bd0ec10bea49b78a819dfbf46c1082e7e620588f9da65a90b71e52bbd
- fc4e382793757858bec4b87527caa4bf2e6f71bb2f5a77bb41a45ddb9ed9d409
- f011e71b711aa54a0c824244fff83fb8b1e1921804624fa0523a6e61612b7f6f
- a8691cdbca5b82e4e48812e48b7a09e4757801fd3909a09975de957d1bfb52dc
- d8946aa464be464674bba6d15729d75572ec75dda49fe7ff0ede1a25ca054941
- d02864cd57c9d041dbd9d6f24327f347b92697a8bc3c86cdf8b738063c6ad002
- 9b78962d840f1ff681e5042264e4d0359cda98ce49d97569df14ce956622b966
- 7bdc22fb35f0a8eb6241782a306a8904fb6f793126ff106a04a96f9f223cb8e1
- e24a4085c54a6362e615f8eab758c12d80e488b73757e6d2b8ab6bfc8be7007e
- 4257f4980955d8376ee1c6bccb4396da726e4ae13d758e47dc4e0775019723f5
- a09b49e9374d43386a6a986944e3dcf515c7e1c38324836df5333b8adbe57797
- 03096688dbb874f7c571691e4241a298284bf4184be339b148f1b48f383a1d7c
- 62f8b228b6126354736d36d9f3b91882bb81eca7702b74fba6471abc7db96a03 (2015-09-30)
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.
For example, a good effect is that many things work pretty well, such as the government. This also helped industry develop.
A bad effect is that they sometimes settle on local minima forever. Examples:If it ain't totally broken, just let it continue forever! See also: Section "History of the University of Oxford".
- as of 2020, they are still using imperial units in everyday life, rather than International System of Units, which was setup by the French, who are much more idealistic, and can therefore can break from such insanity more often.
- the persistence of the insane system of colleges of the University of Oxford
- the incredibly late date of the decimal day in 1971, and that was partly due to the advent of the computer. That one was too much, even for the Brits, or maybe it helped that the greedy financiers were involved
- the British train system as of the 2010's, which is completely not unified, each part operated by a different company with different standards. Private and public unification efforts are ongoing, Trainline being one of the best/only private buy from any line unification approaches.
- Church of England priests can marry, which reduces the proportion of pedophiles. Also women were accepted starting in the 1970's in certain dioceses (non uniform rules as usual, typical of English pragmatism), including for bishop
Bibliography:
- www.reddit.com/r/BitcoinBeginners/comments/9dlo3w/how_to_write_arbitrary_data_on_the_bitcoin/
- bitcoin.stackexchange.com/questions/73165/how-to-store-arbitrary-data-in-the-bitcoin-blockchain-and-how-can-i-differentiat
- bitcoin.stackexchange.com/questions/32575/what-methods-are-currently-used-to-embed-additional-data-into-the-bitcoin-blockc
Surely You're Joking, Mr. Feynman chapter An Offer You Must Refuse (a play on words on The Godfather (1972)) has an interesting historical mention from the early 1950s while at Caltech:
The next day, I had the greatest luck in making a decision. God must have set it up to help me decide. I was walking to my office, and a guy came running up to me and said, "Hey, Feynman! Did you hear what happened? Baade found that there are two different populations of stars! All the measurements we had been making of the distances to the galaxies had been based on Cephid variables of one type, but there's another type, so the universe is twice, or three, or even four times as old as we thought!"I knew the problem. In those days, the earth appeared to be older than the universe. The earth was four and a half billion, and the universe was only a couple, or three billion years old. It was a great puzzle. And this discovery resolved all that: The universe was now demonstrably older than was previously thought. And I got this information right away - the guy came running up to me to tell me all this.
Pinned article: Introduction to the OurBigBook Project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Intro to OurBigBook
. Source. We have two killer features:
- topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculusArticles of different users are sorted by upvote within each article page. This feature is a bit like:
- a Wikipedia where each user can have their own version of each article
- a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 3. Visual Studio Code extension installation.
Figure 4. Visual Studio Code extension tree navigation.
Figure 5. Web editor. You can also edit articles on the Web editor without installing anything locally.Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.Video 4. OurBigBook Visual Studio Code extension editing and navigation demo. Source. 
- Infinitely deep tables of contents:
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact