quizchain/2

Solved on 2019-04-07 after 34m, key published. 0.007 BTC on a Bitcoin address, 1JP2qF74zzgz6FMzsmk7nxUeYd7aYCAMHc. Part of Quizchain.

quizchain/2 solved bitcoin Quizchain

prize: 0.007 BTC
key material: wif
public key: compressed · 031c4dc0e0…a0e1269e
started: 2019-04-07
solved: 2019-04-07 · 34m
verification: key derives the address

address · p2pkh

1JP2qF74zzgz6FMzsmk7nxUeYd7aYCAMHc blockstream.info

hash160 bea4d18e2d7861e23df06c8d4a7ab51a05a12a48

balance

asking the explorer

key material · on the record

WIF: Kz6upYXvTYY7r8uYZsRuuyyhbcRvXe6tKDFusRKco31Vw2TLihBF
entropy hash: e743564b041b97e4d61897cb41f90b83b38105298ccbd36899786b0c742e600d
entropy source: SHA-256 of the solution with the last three characters of the block 1 key appended

transactions · 2

funding2019-04-070.007 BTCdd09d3f542576c7d…50b752620a
claim2019-04-070.00682539 BTCccc30669f3961def…940fbb7ba5

hints · 3 · who said it, where, and what confirms that

officialQuestion: The following sentence is the first in the top post of a certain subreddit I am following. One of the letters in the family name of the author is changed from lower to upper case. Change the other letters in his name in the same way for the solution.
source reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2 · confirmation web.archive.org/web/20230611110305/https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2 (Wayback capture of the post with the solution edit)
Published answer
I posted A similar messaGe to the Basecamp, but had to also come visit You all here oN Reddit.
source reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2
officialThen append the last three digits from the private key of the solution to block 1. Do a SHA 256 hash on that and use as entropy in the Ian Coleman brain wallet tool.
source reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2
officialSentence: I posted A similar message to the Basecamp, but had to also come visit you all here on Reddit.
source reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2

source

open in the playground

https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/

toolpuzzles_show

what a model reads · MCP · Pi · OMP

quizchain/2	solved	0.007 BTC	1JP2qF74zzgz6FMzsmk7nxUeYd7aYCAMHc
chain: bitcoin  address kind: p2pkh
hash160: bea4d18e2d7861e23df06c8d4a7ab51a05a12a48
public key: 031c4dc0e046216624b8b932ece5c6eadd13f746f0a549c48b329fb150a0e1269e (compressed)
private key: Kz6upYXvTYY7r8uYZsRuuyyhbcRvXe6tKDFusRKco31Vw2TLihBF (wif)
entropy: e743564b041b97e4d61897cb41f90b83b38105298ccbd36899786b0c742e600d from https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/ (SHA-256 of the solution with the last three characters of the block 1 key appended)
started: 2019-04-07 06:57:24
solved: 2019-04-07 07:32:15 (34m)
transactions: 2
	funding	2019-04-07 06:57:24	0.007 BTC	dd09d3f542576c7db2414fdfec68cb48757fca3e9d1c59142eaedb50b752620a
	claim	2019-04-07 07:32:15	0.00682539 BTC	ccc30669f3961defc8c14b2a877dc16cabddb7dfa7c56770ef05e3940fbb7ba5
claim: https://blockstream.info/tx/ccc30669f3961defc8c14b2a877dc16cabddb7dfa7c56770ef05e3940fbb7ba5
hints: 3
	official	-	Question: The following sentence is the first in the top post of a certain subreddit I am following. One of the letters in the family name of the author is changed from lower to upper case. Change the other letters in his name in the same way for the solution.	source: https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/	confirmation: https://web.archive.org/web/20230611110305/https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/ (Wayback capture of the post with the solution edit)	answer: I posted A similar messaGe to the Basecamp, but had to also come visit You all here oN Reddit.	answer source: https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/
	official	-	Then append the last three digits from the private key of the solution to block 1. Do a SHA 256 hash on that and use as entropy in the Ian Coleman brain wallet tool.	source: https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/
	official	-	Sentence: I posted A similar message to the Basecamp, but had to also come visit you all here on Reddit.	source: https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/
explorer: https://blockstream.info/address/1JP2qF74zzgz6FMzsmk7nxUeYd7aYCAMHc
source: https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/

puzzle.toJSON() absent fields are absent, never null

{
  "id": "quizchain/2",
  "chain": "bitcoin",
  "address": {
    "value": "1JP2qF74zzgz6FMzsmk7nxUeYd7aYCAMHc",
    "kind": "p2pkh",
    "hash160": "bea4d18e2d7861e23df06c8d4a7ab51a05a12a48"
  },
  "status": "solved",
  "pubkey": {
    "value": "031c4dc0e046216624b8b932ece5c6eadd13f746f0a549c48b329fb150a0e1269e",
    "format": "compressed"
  },
  "key": {
    "wif": {
      "decrypted": "Kz6upYXvTYY7r8uYZsRuuyyhbcRvXe6tKDFusRKco31Vw2TLihBF"
    },
    "seed": {
      "entropy": {
        "hash": "e743564b041b97e4d61897cb41f90b83b38105298ccbd36899786b0c742e600d",
        "source": {
          "url": "https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/",
          "description": "SHA-256 of the solution with the last three characters of the block 1 key appended"
        }
      }
    }
  },
  "prize": 0.007,
  "start_date": "2019-04-07 06:57:24",
  "solve_date": "2019-04-07 07:32:15",
  "solve_time": 2091,
  "source_url": "https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/",
  "transactions": [
    {
      "tx_type": "funding",
      "txid": "dd09d3f542576c7db2414fdfec68cb48757fca3e9d1c59142eaedb50b752620a",
      "date": "2019-04-07 06:57:24",
      "amount": 0.007
    },
    {
      "tx_type": "claim",
      "txid": "ccc30669f3961defc8c14b2a877dc16cabddb7dfa7c56770ef05e3940fbb7ba5",
      "date": "2019-04-07 07:32:15",
      "amount": 0.00682539
    }
  ],
  "hints": [
    {
      "kind": "official",
      "text": "Question: The following sentence is the first in the top post of a certain subreddit I am following. One of the letters in the family name of the author is changed from lower to upper case. Change the other letters in his name in the same way for the solution.",
      "source": "https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/",
      "confirmation": {
        "url": "https://web.archive.org/web/20230611110305/https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/",
        "description": "Wayback capture of the post with the solution edit"
      },
      "answer": {
        "text": "I posted A similar messaGe to the Basecamp, but had to also come visit You all here oN Reddit.",
        "source": "https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/"
      }
    },
    {
      "kind": "official",
      "text": "Then append the last three digits from the private key of the solution to block 1. Do a SHA 256 hash on that and use as entropy in the Ian Coleman brain wallet tool.",
      "source": "https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/"
    },
    {
      "kind": "official",
      "text": "Sentence: I posted A similar message to the Basecamp, but had to also come visit you all here on Reddit.",
      "source": "https://www.reddit.com/r/bitcoinpuzzles/comments/badtpz/easy_7_mbtc_quizchain_block_2/"
    }
  ]
}