Bitcoin Fun

This is a curated list of fun and interesting things in the blockchain or related to the underlying data:

Historical firsts
Technical quirks and oddities
Cultural references

Help curating this list is welcome! You can submit new items by opening an issue or PR on Github.

Newest First Oldest First By Year By Month

January

Date	Item	Reference
2022-01-13	Unspendable output due to invalid public key	suredbits.com
2021-01-31	Transaction output values used to encode botnet command-and-control IP address	arstechnica.com
2021-01-29	In retrospect, it was inevitable	twitter.com
2018-01-20	First > 2MB block	twitter.com
2012-01-30	First send to a Pay-to-MultiSig (P2MS) output	unchained.com
2009-01-16	First send to a Pay-to-Public Key Hash (P2PKH) address	unchained.com
2009-01-12	First block containing a non-coinbase transaction	bitcointalk.org
2009-01-12	First transfer of bitcoin	-
2009-01-03	Bitcoin Genesis Block	en.bitcoin.it
2009-01-03	Coinbase transaction of the Genesis Block	github.com

March

Date	Item	Reference
2020-03-11	500+ million USD transferred for < 1 USD fee (2020 prices)	-
2013-03-24	Last 'Version 1' block	github.com
2012-03-07	First experimental (pre-activation) send to a Pay-to-Script Hash (P2SH) output, before the P2SH soft-fork activated	unchained.com

April

Date	Item	Reference
2021-04-14	NYTimes 10/Mar/2021 House Gives Final Approval to Biden's $1.9T Pandemic Relief	twitter.com
2013-04-06	Bitcoin whitepaper, embedded in the Bitcoin blockchain	bitcoin.stackexchange.com
2012-04-08	First post-activation send to a P2SH output	unchained.com

May

Date	Item	Reference
2022-05-18	Lightning Network penalty transaction	fiatjaf.com
2020-05-20	Very old coins (mined ~1 month after genesis) move unexpectedly, causing uproar	twitter.com
2020-05-11	First block of subsidy era #4 (6.25 BTC)	github.com
2020-05-11	'Times 09/Apr/2020 With $2.3T Injection, Fed's Plan Far Exceeds 2008 Rescue'	-
2011-05-18	Midnightmagic's 'Missing Satoshi' (provably lost/destroyed bitcoin)	bitcointalk.org
2010-05-22	The "Bitcoin Pizza" transaction	bitcointalk.org

June

Date	Item	Reference
2021-06-13	Taproot Lock-In via "Speedy Trial" mechanism	github.com
2021-06-07	Diario El Salvador 6/Jun/2021 Bitcoin tendra validez legal	twitter.com
2015-06-21	Value provably destroyed in OP_RETURN output	bitcoin.stackexchange.com
2014-06-16	Star Wars: A New Hope	-

July

Date	Item	Reference
2021-07-23	First experimental (pre-activation) mainnet SPEND (!) of a Pay-to-Taproot (P2TR) output	b10c.me
2020-07-15	July 2020 Twitter hack BTC address	twitter.com
2016-07-09	First block of subsidy era #3 (12.5 BTC)	github.com
2015-07-07	The Megatransaction	rusty.ozlabs.org
2011-07-18	Mt Gox's 'Proof of Solvency' transaction	letstalkbitcoin.com
2010-07-29	Early transaction with MANY (4,000+) OP_CHECKSIG commands, before this DoS vector was fixed	en.bitcoin.it

August

Date	Item	Reference
2017-08-25	First > 1MB block	en.bit.news
2017-08-24	First SegWit block	twitter.com
2017-08-24	First SegWit transaction	twitter.com
2017-08-24	First send to a Pay-to-Witness Script Hash (P2WSH) output	unchained.com
2017-08-24	First send to a Pay-to-Witness Public Key Hash (P2WPKH) output	unchained.com

September

Date	Item	Reference
2013-09-13	SHA1 collision bounty	bitcointalk.org
2013-09-13	SHA256 collision bounty	bitcointalk.org
2013-09-13	RIPEMD160 collision bounty	bitcointalk.org
2013-09-13	RIPEMD160(SHA256()) collision bounty	bitcointalk.org
2013-09-13	SHA256(SHA256()) collision bounty	bitcointalk.org

October

Date	Item	Reference
2022-10-09	@brqgoo's 998-of-999 tapscript multisig	github.com
2009-10-12	First bitcoin traded for fiat currency	twitter.com

November

Date	Item	Reference
2022-11-01	@brqgoo's (second) LND-breaking transaction	github.com
2021-11-14	First Taproot-enforcing block	twitter.com
2021-11-14	First post-activation Pay-to-Taproot (P2TR) transaction in Bitcoin's history	twitter.com
2021-11-14	First post-activation mainnet spend of a Pay-to-Taproot (P2TR) output	twitter.com
2021-11-14	First use of OP_CHECKSIGADD	twitter.com
2013-11-05	Never gonna give you up...	bitcoin.stackexchange.com
2012-11-28	First block of subsidy era #2 (25 BTC)	github.com
2011-11-16	Current largest output transaction	blockchair.com
2010-11-14	Duplicated coinbase transaction #1	bitcoin.stackexchange.com
2010-11-14	Duplicated coinbase transaction #2	bitcoin.stackexchange.com

December

Date	Item	Reference
2022-12-14	Ordinals Inscription #0	ordinals.com
2021-12-06	Far-future dated Locktime value	-
2019-12-17	First experimental (pre-activation) mainnet send to a Pay-to-Taproot (P2TR) output	b10c.me
2017-12-30	Block reward lost	bitcoin.stackexchange.com
2011-12-03	Brainwallet address for 'Satoshi Nakamoto'	twitter.com