Ciro Santilli @cirosantilli 37

Besides ASCII art, the huge majority of images is encoded with the AtomSea & EMBII system/format. All images in that system will be documented in that section.

Rickrolling lyrics were mined several times into the blockchain.

The 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

Around block block 246k (e.g. 27b7c526489dac8245747fa1c425a2e3eb07dea57b294eb4ae583fec9b859fcf, 2013-10-17) we note several transactions starting with a XML format <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 stringfollowed 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.

tx 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!!!

biocyc.org/ECOLI/NEW-IMAGE?type=EXTRAGENIC-SITE&object=G0-10506:

Note that this is not the conventional starting point for gene numbering: Section "E. Coli genome starting point".

Contains a lot of different flag masks.

essential metabolism for a minimal cell (2019) mentions:

phenomena.nationalgeographic.com/2016/04/21/we-built-the-worlds-simplest-cell-but-dunno-how-it-works/ likely talks about it.

Stuff built on top:

A quantum circuit is a graph of quantum logic gates.

Quantum circuits are the prevailing model of quantum computing as of the 2010's - 2020's

mathoverflow.net/questions/11540/what-are-the-most-attractive-turing-undecidable-problems-in-mathematics/103415#103415 provides a specific single undecidable Diophantine equation.

Contains the path to the dynamic loader, i.e. /lib64/ld-linux-x86-64.so.2 in Ubuntu 18.10. Explained at: stackoverflow.com/questions/8040631/checking-if-a-binary-compiled-with-static/55664341#55664341

The cheapest and most resilient way to publish text content humanity has achieved so far.

Some tests:

Before:

Oh, commit 6 was crap:

Mark 6 to be modified.

After:Better now, ready to push.

Note: history changes change all commits SHAs. All parents are considereEven time is considered. So is commit message/author. And obviously file contents. So now commit "7" will actually have a different SHA.