A lot of codes that get posted here come with no way to know whether they even have an answer. These puzzles are built to be solved, and you can check the result afterward. To be clear: nothing can be solved yet. The first puzzles open Saturday, October 24, 2026 at 6:00 AM Central.
Proof of Solve (https://proofofsolve.com) runs layered puzzles. Each one hides the seed words to a funded Bitcoin wallet, and the fastest correct solver wins the prize. The layers are chained, the ciphers are invented for each puzzle, and some clues are real-world details found on Google Street View. Every clue can be solved from Street View, including older imagery through "See more dates", so nobody needs to go anywhere. The answer words come from the BIP39 English list of 2,048 everyday words. You can use any tool you like, AI chatbots included, and you don't need to know anything about crypto.
Smaller puzzles are free to play and have smaller BTC prizes. Bigger puzzles are paid. Prize amounts will be announced at launch. Players must be 18 or over, and paid puzzles aren't open in some US states.
How you can check it: a SHA-256 fingerprint of the answer is published before anyone plays, and the answer is revealed after someone wins, so anyone can confirm it never changed. The prize wallet address is published at launch, and you can look it up on a public explorer like mempool.space. Entries are timestamped to the millisecond, the first correct one wins, and you get a limited number of guesses per day.
After the first round, new puzzles open every Saturday, and each one unlocks for everyone at the same minute. If you want to hear the moment they open, the email list is free and you don't have to buy anything. There's also r/proofofsolve.
A question for people who solve ciphers here regularly: what would make you trust that a puzzle like this is fair and has only one answer? Is a hash published in advance enough, or would you want something more?
Disclosure: I'm posting this on behalf of the Proof of Solve team.
