Collections
Collections
Every collection in the registry and the chains it lives on. Each page says what the puzzle was and what the records carry. The list and every dossier are read off the library when the page builds.
Every collection answers the same calls: get, require, all, solved, unsolved, withPubkey, count, verify, balance. What changes is the puzzle itself. A search over a key range. A brainwallet passphrase. An image with a seed hashed into it. A script that pays for a hash collision. A thread explains those once and a dataset forgets them. So each page here writes them down next to the numbers.
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| About | |||
|---|---|---|---|
| Bitcoin puzzle transaction | bits | 256 addresses with keys of 1 to 256 bits. The one everybody scans. | 77 of 256 open |
| Quizchain | quizchain | A quiz answer plus a piece of the previous block's key, hashed into a wallet. The chain ran from April to July 2019, one block at a time. | 0 of 77 open |
| Quizchain2 | quizchain2 | The quizchain's second run, from May 2019. Most blocks stand alone now, an answer and a TOMI field hashed with MD5, and by block 6 the thread is arguing about scripts versus humans. | 0 of 77 open |
| RushWallet contest | rushwallet | Thirty brainwallets from 2014. Almost all cracked since. | 1 of 30 open |
| Zden's puzzles | zden | Fifteen visual puzzles on four chains, most of them solved. | 1 of 16 open |
| Move Over Brokers treasure hunt | move-over-brokers | Twelve keys hidden in a blockchain book and its Italian translation. One answer is Sherlock Holmes's address, another is printed only on the back cover. | 3 of 12 open |
| Puzzle Weave | weave | Tiamat's weave puzzles. Prizes in AR and ETH. Four still open. | 3 of 12 open |
| RetiredCoder's mini-puzzles | mini | Seven small riddles on Bitcointalk. Four replay a solved puzzle key for the Bitcoin Cash still on its address, three put 0.01 BTC on a fresh key. | 0 of 7 open |
| Hash collision bounties | hash-collision | Peter Todd's P2SH scripts that pay for a collision. SHA-1 fell in 2017. | 4 of 6 open |
| WarpWallet challenges | warp | Keybase's scrypt brainwallet. Four solved, two expired with the keys published. | 0 of 6 open |
| TeikhosBounty | teikhos | Five Ethereum contracts that want a public key nobody published. Four can pay, and one did in 2026, with a key a failed attempt left on chain four years earlier. | 4 of 5 open |
| Ballet wallets | ballet | Three BIP38 encrypted keys printed on physical wallets. | 2 of 3 open |
| Coin_Games weekly banknote puzzles | coin-games | Banknotes stuffed with skulls, lions and statues, a few thousand sats each. Every prize emptied by somebody who never said how. | 0 of 3 open |
| Dug's Student Treasure Hunt | dug | Twelve lecture words, three Bitcoin prizes. A better reason to take notes. | 0 of 3 open |
| Bitimage | bitimage | Seeds hashed out of photographs. One solved, one waits on a passphrase. | 1 of 2 open |
| Crypto Puzzles on YouTube | crypto-puzzles | Two pairs of short videos with a raw Ether key in the footage. The first was gone within seven hours of its part 2. The second has sat on 0.05 ETH since 2018. | 1 of 2 open |
| Doge's Gambit | doges-gambit | A chess board with coins for pieces, sixteen frames and two keys in one clip. The 10,000 DOGE went from about $50 to a few thousand dollars while nobody could read it. | 0 of 2 open |
| Grycoin chain | grycoin | Quizchain under a new name, and over within a week. Block 1 was claimed before its post went up, block 2 with a solution its own author admits not knowing. | 0 of 2 open |
| IAMABananaAMAA's puzzles | iamabananaamaa | Two puzzles from the first night of r/bitcoinpuzzles. A ZIP after the last byte of a GIF, then a Caesar riddle whose key needed no shift at all. | 0 of 2 open |
| LuckyLurker Bitcoin Vault puzzles | luckylurker | Paul Jones’s two Bitcoin Vaults. The first solved, the second funded with 1 BTC. | 1 of 2 open |
| Smith, Lyle & Moore treasure hunts | smith-lyle-moore | An indie band spent its ad budget on bitcoin and hid it behind riddles on its own website. The moon trip ended in Morse and a password called supernova. The sea voyage ended with a failed checksum. | 0 of 2 open |
| Walking Banks seed hunt | walking-banks | A thriller whose murder victims carry a seed phrase in their DNA, and a real one hidden in the book. Four words decode on page 122. The other twenty, and 800,000 sats, are still out there. | 2 of 2 open |
| kTimesG's 80-bit key challenge | 80-bit | 80 unknown bits in a 511-bit key. The public key only ever showed up in the mempool. Taken 39 minutes in. | closed |
| Gem Finder's 9vw04 puzzle | 9vw04 | One tweet, five characters and a grid of letters and digits in five colours. Everything for the WIF is in the post, the author says. Rainbows, not so much. | open |
| Brute force and the coins are yours | bitaddress | A paper wallet whose owner forgot the BIP38 passphrase and gave the coins to whoever guesses it. Probably three old passwords glued together. Good luck, q didn't have any. | open |
| Bitaps mnemonic challenge | bitaps | A 3 of 5 secret sharing scheme with two shares published. | open |
| 7 million book quiz | book-quiz | Seven questions about a campaign book, one hour to sweep it. The deadline won and the author took the prize back. | closed |
| Brave New World | brave-new-world | All of 2020 in one collage, runes included. Find the seed phrase, says the picture. Six years on, the 0.2 BTC is still there. | open |
| TORCHED H34R7S Bitcoin Puzzle | coin-artist | TORCHED H34R7S. A Bitcoin key painted into flames and decoded in 2018. | closed |
| Genesis Block Wallet Puzzle | genesis | Two keys hidden in Genesis block data, and the PBKDF2 rounds hidden in its timestamp. Solved. | closed |
| The Great Riddle | great-riddle | A seed of 24 words hidden one by one in the original ballpoint drawings of the Genesis Collection. Prints carry nothing, and the 25th word comes from the artist. | open |
| GSMG.io puzzle | gsmg | A multi phase image puzzle. The prize has been halved twice. | open |
| Hunting Time seed phrase hunt | hunting-time | A seed phrase hidden in a thriller. Most words were times in the plot, and the title was the biggest clue. Claimed in seven weeks. | closed |
| Ledger Donjon CTF | ledger-donjon | Scissors Secret Sharing. Twelve BIP39 words, ten out of order. CTF points, not a BTC prize. | closed |
| La Liberté guidant le peuple 2019 | liberte-guidant-le-peuple | Delacroix repainted with yellow vests on a wall in Paris. Half the seed hides in coloured strokes, half glows under black light, all of it in French. Claimed six days in. | closed |
| The 10 ETH challenge | mineshop | Six seed words in a video, six in the blog post it links to. The author still spends from the wallet. | open |
| Bitcoin Movie Enigma | movie-enigma | 34 film stills, one BIP39 word each, ten intruders. Solved in 2026 with a phrase whose checksum fails. | closed |
| Natasha Otomoski puzzle, 1 BTC | natasha-otomoski | One question, 32 characters of plain text as the private key. Someone typed the right eight words seven months later and never said how. | closed |
| Path to Greatness | path-to-greatness | Clues hidden in a parkour game demo lead to a Litecoin key. Donations go straight into the prize, and nobody has taken it. | open |
| kTimesG's Phy Challenge | phy | A signed forum post, a signature the author's cat cut one character short, and grey emojis spiralling around a gold coin. The signature gives up the address. The key behind it, and 800,000 sats, nobody has found yet. | open |
| 1 mBTC picture puzzle | picture-puzzle | A directory, an eye, the letter O and a QR code: a page on directory.io and the 36th key down. Claimed five hours in. | closed |
| Powerful Moss | powerful-moss | Twelve songs on Donkey Kong Country 2 soundfonts and a twelve-word seed somewhere in them. The prize sat in a contract on Base that opened only for the wallet the seed derives, until somebody opened it in October 2026. | closed |
| Building an awesome eCash community | proof-of-writing | An essay on what makes a crypto community, with a Cashtab seed on its diagonal: word one of one paragraph, word two of the next. 30 million XEC by the time it fell. | closed |
| Quizchain Real Big Block | real-big-block | 777 mBTC for the final version of a Wattpad chapter, line breaks and all. The author once rated the odds below humanity passing the reverse Turing test, and so far that holds. | open |
| Satoshi birthday 7 million quiz | satoshi-birthday-quiz | Seven questions about Bitcoin history, hashed into a brainwallet. Swept five hours after it was funded. | closed |
| Satoshi-Maze, Phemex 2.1 BTC puzzle | satoshi-maze | Satoshi drawn as a maze by an exchange. Nobody beat the deadline, so the designer published the key: a prime from e times two Base58 words read little endian. | closed |
| School of Bitcoin business card | school-of-bitcoin | A million sats behind a business card, shown once the account hit 2000 followers. Morse, Wingdings and three QR codes on one side, and the coins haven't moved since October 2024. | open |
| seed-phrase.com | seed-phrase | Clues every few days toward a recovery phrase: a poem, a JAZZ crowd, a nauseous emoji and a box that changes colour with the video speed. Then August 2024 ended and so did the clues. The 0.01 BTC is still waiting. | open |
| Brainwallet puzzle, 0.04 BTC | trivia-brainwallet | Twelve riddles from patents to chess to a ham deal, typed into brainwallet.io as a passphrase and a salt. Swept six hours after the post. | closed |
| Securing Wealth in Poetry | wealth-in-poetry | An essay on hiding seed phrases in stories, with a real one hidden in the essay. You've read every word, it says. The 0.03 BTC is still there. | open |
| Wickex's YouTube puzzle | wickex | Hex that spells a YouTube link, Morse in the audio, a passphrase in a spectrogram. Swept 46 minutes in, sent back, swept again. | closed |
What every page says
- The dossier at the top is read off the collection in the build. The counts, prize sums and hints can't drift from the records.
- The prose says what the puzzle asks, what's known about its keys, and how the records are written. One record is quoted the way it sits on disk.
- Quirks get named. A status that needs explaining, a prize that shrank, a passphrase nobody has. The page says so instead of leaving it to the thread.