quizchain2/22

Solved on 2019-05-30 after 5h 19m, key derived from the published recipe. 0.007 BTC on Bitcoin.

Story

What the post asked, what the answer turned out to be, and what the chain says happened. The record below holds the data.

Claimed before posting

May 30, 2019. The question is a Wikipedia link, the Ninety-five Theses. The format is [solution], no TOMI, digits aa0. The author thought the last block was hard enough to skip the TOMI field. That call aged badly.

The funding transaction confirmed at 03:16:17 UTC. The claim confirmed at 08:35:57, five hours later. The post went up at 12:47:39. So by the time anyone could read the question, the coins were gone.

Bitcoin white paper

Luther posted the theses on October 31. Satoshi posted the white paper on October 31 too. So the solution is Bitcoin white paper. The author admits it would have been fairly difficult to spot.

Somebody spotted it anyway, before seeing anything. How? u/HeroKaito explained in the thread. They had already run a bunch of obvious Bitcoin answers through Ian Coleman's BIP39 tool and kept the addresses. The new address looked familiar. It was on the list.

They offered the money back. The author said keep it.

u/silver_anth had a different lesson. In the first run they solved block 26 the same way, before the post. The author promised a TOMI field in every block from now on. A whole block, lost to a list of guesses. Fair game, honestly.

IDquizchain2/2222 / 772019-05-30

Puzzle / quizchain2

22

bitcoinp2pkh solved

Record

puzzle({
  chain: "bitcoin",
  address: "1CU5ZeSC65qX…Haio7a59",
  status: Status.Solved,
  key: wif("KzjcAZSJijpZ…ctWNAs88").entropy("aa0e948775fa…66b5500b", source("https://www.…lock_22/")).derived(),
})

Prize: 0.007 BTC
Key material: wif, derived from the recipe
Verification: verified
Solved: 2019-05-30 · 5h 19m

tx 2

Trail: Explorerblockstream.info; Sourcereddit.com/r/Grycoin/comments/busqnm/prize_claimed_before_posting_quizchain2_block_22; Tryquizchain2/22 in the playground

Address: 1CU5ZeSC65qXpEztyHAFagz7PfHaio7a59

hash160 7dc86c68547e1c347a297d36a0035fbeaf80d80f

Balance

asking the explorer

Key

public key · compressed: 03a38ae1ebff619d8232915bc1d86c3c826452de548e6d0a6836a50c4450c51fbb
WIF: KzjcAZSJijpZCKt51Hs8ah3Jowubx47LDrExCgr93mZNctWNAs88
entropy hash: aa0e948775fa99561a0efd2f66b5500b
entropy source: MD5 of the three words

Transactions

funding2019-05-300.007 BTC21257d3d61…4f4aa4
claim2019-05-300.00668474 BTC89d5cd5a66…905d8b

Files

Techniques

md5-to-bip39-entropypuzzlereddit.com/r/Grycoin/comments/busqnm/prize_claimed_before_posting_quizchain2_block_22

Hints

undated
officialQuestion: https://en.m.wikipedia.org/wiki/Ninety-five_Theses
Sourcereddit.com/r/Grycoin/comments/busqnm/prize_claimed_before_posting_quizchain2_block_22
Published answer
The solution for this was "Bitcoin white paper". I used the fact that Luther posted the 95 theses on October 31, which is the same date as the white paper.
Sourcereddit.com/r/Grycoin/comments/busqnm/prize_claimed_before_posting_quizchain2_block_22
undated
officialFormat: [solution]
Sourcereddit.com/r/Grycoin/comments/busqnm/prize_claimed_before_posting_quizchain2_block_22
undated
officialIn an interesting coincidence, the first three digits of the MD5 hash for this block are aa0.
Sourcereddit.com/r/Grycoin/comments/busqnm/prize_claimed_before_posting_quizchain2_block_22