quizchain/3

Solved on 2019-04-07 after 10m, key published. 0.007 BTC on a Bitcoin address, 1Nsi6LxpKqg5CDVrswn6YPNQaGBhdhUCMs. Part of Quizchain.

quizchain/3 solved bitcoin Quizchain

prize: 0.007 BTC
key material: wif
public key: compressed · 028faeaeb6…3a90e58f
started: 2019-04-07
solved: 2019-04-07 · 10m
verification: key derives the address

address · p2pkh

1Nsi6LxpKqg5CDVrswn6YPNQaGBhdhUCMs blockstream.info

hash160 eff1bdd59bfa0635856eb7dd7b4cfc7ddf4d01d5

balance

asking the explorer

key material · on the record

WIF: KxN3DX8bKLTMNhppf6FqjvCKaLBCi5mN5vGyVNQRUxjdwt4o683S
entropy hash: 4b1f87124aa427ca3f7e7dbf3d8ee8bf7e3985c488be5d7d53e65119b631d743
entropy source: SHA-256 of the random number with the last three characters of the block 2 key appended

transactions · 2

funding2019-04-070.007 BTCe6aa641de6fffe6b…10822fc93a
claim2019-04-070.00672314 BTC75e81859b409270a…28c33f641c

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

officialFirst part: Pick a random 3 digit number.
source reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3
Published answer
777
source reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3
officialSecond part: Last three digits of the private key of block 2.
source reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3
Published answer
hBF
source reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3
officialCombine both parts, take SHA 256 hash of that and input the result as entropy in the Ian Coleman brain wallet tool.
source reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3

source

open in the playground

https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/

toolpuzzles_show

what a model reads · MCP · Pi · OMP

quizchain/3	solved	0.007 BTC	1Nsi6LxpKqg5CDVrswn6YPNQaGBhdhUCMs
chain: bitcoin  address kind: p2pkh
hash160: eff1bdd59bfa0635856eb7dd7b4cfc7ddf4d01d5
public key: 028faeaeb616580d0b710d6ab4bb625fe157f3a2aaf393df3ac653df8f3a90e58f (compressed)
private key: KxN3DX8bKLTMNhppf6FqjvCKaLBCi5mN5vGyVNQRUxjdwt4o683S (wif)
entropy: 4b1f87124aa427ca3f7e7dbf3d8ee8bf7e3985c488be5d7d53e65119b631d743 from https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/ (SHA-256 of the random number with the last three characters of the block 2 key appended)
started: 2019-04-07 07:51:08
solved: 2019-04-07 08:01:41 (10m)
transactions: 2
	funding	2019-04-07 07:51:08	0.007 BTC	e6aa641de6fffe6b15d96492069bb6b1ee130a5b89e37e02a2919f10822fc93a
	claim	2019-04-07 08:01:41	0.00672314 BTC	75e81859b409270a378eface94174c635b2575da7aa0a8def53e7228c33f641c
claim: https://blockstream.info/tx/75e81859b409270a378eface94174c635b2575da7aa0a8def53e7228c33f641c
hints: 3
	official	-	First part: Pick a random 3 digit number.	source: https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/	answer: 777	answer source: https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/
	official	-	Second part: Last three digits of the private key of block 2.	source: https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/	answer: hBF	answer source: https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/
	official	-	Combine both parts, take SHA 256 hash of that and input the result as entropy in the Ian Coleman brain wallet tool.	source: https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/
explorer: https://blockstream.info/address/1Nsi6LxpKqg5CDVrswn6YPNQaGBhdhUCMs
source: https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/

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

{
  "id": "quizchain/3",
  "chain": "bitcoin",
  "address": {
    "value": "1Nsi6LxpKqg5CDVrswn6YPNQaGBhdhUCMs",
    "kind": "p2pkh",
    "hash160": "eff1bdd59bfa0635856eb7dd7b4cfc7ddf4d01d5"
  },
  "status": "solved",
  "pubkey": {
    "value": "028faeaeb616580d0b710d6ab4bb625fe157f3a2aaf393df3ac653df8f3a90e58f",
    "format": "compressed"
  },
  "key": {
    "wif": {
      "decrypted": "KxN3DX8bKLTMNhppf6FqjvCKaLBCi5mN5vGyVNQRUxjdwt4o683S"
    },
    "seed": {
      "entropy": {
        "hash": "4b1f87124aa427ca3f7e7dbf3d8ee8bf7e3985c488be5d7d53e65119b631d743",
        "source": {
          "url": "https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/",
          "description": "SHA-256 of the random number with the last three characters of the block 2 key appended"
        }
      }
    }
  },
  "prize": 0.007,
  "start_date": "2019-04-07 07:51:08",
  "solve_date": "2019-04-07 08:01:41",
  "solve_time": 633,
  "source_url": "https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/",
  "transactions": [
    {
      "tx_type": "funding",
      "txid": "e6aa641de6fffe6b15d96492069bb6b1ee130a5b89e37e02a2919f10822fc93a",
      "date": "2019-04-07 07:51:08",
      "amount": 0.007
    },
    {
      "tx_type": "claim",
      "txid": "75e81859b409270a378eface94174c635b2575da7aa0a8def53e7228c33f641c",
      "date": "2019-04-07 08:01:41",
      "amount": 0.00672314
    }
  ],
  "hints": [
    {
      "kind": "official",
      "text": "First part: Pick a random 3 digit number.",
      "source": "https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/",
      "answer": {
        "text": "777",
        "source": "https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/"
      }
    },
    {
      "kind": "official",
      "text": "Second part: Last three digits of the private key of block 2.",
      "source": "https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/",
      "answer": {
        "text": "hBF",
        "source": "https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/"
      }
    },
    {
      "kind": "official",
      "text": "Combine both parts, take SHA 256 hash of that and input the result as entropy in the Ian Coleman brain wallet tool.",
      "source": "https://www.reddit.com/r/bitcoinpuzzles/comments/bae43s/easy_7_mbtc_quizchain_block_3/"
    }
  ]
}