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 block mined that was greater than 2MB.	twitter.com
2009-01-12	First block containing a (non-coinbase) transaction.	bitcointalk.org
2009-01-12	The first transfer of bitcoin.	-
2009-01-03	The Bitcoin Genesis Block.	en.bitcoin.it
2009-01-03	The 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	The last 'Version 1' block.	github.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	The Bitcoin whitepaper embedded in the Bitcoin blockchain.	bitcoin.stackexchange.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	The (real) first mainnet spend of Pay-to-Taproot (P2TR) outputs.	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 block mined that was greater than 1MB.	en.bit.news
2017-08-24	First SegWit block.	twitter.com
2017-08-24	First SegWit transaction.	twitter.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	The first Taproot-enforcing block	twitter.com
2021-11-14	The first (post-activation) Pay-to-Taproot (P2TR) transaction in Bitcoin's history.	twitter.com
2021-11-14	The first mainnet spend of a Pay-to-Taproot (P2TR) output.	twitter.com
2021-11-14	The 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	The 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	The (real) first mainnet Pay-to-Taproot output.	b10c.me
2017-12-30	Block reward lost	bitcoin.stackexchange.com
2011-12-03	Brainwallet address for 'Satoshi Nakamoto'	twitter.com