A way for a crowd to commit bitcoin to a cause, with nobody holding it.

How it works

1. 1

   You lock your own bitcoin

   It stays in your wallet until a date you choose. From that date it is yours to take home, and nobody can stop you.

2. 2

   One public total

   Only locked bitcoin is counted. Anyone can add it up again from the blockchain and get the same number.

3. 3

   A purchase is funded, or it isn't

   There is no vote. Each person signs their own locked bitcoin into a published proposal, and a co-signer adds the second signature. The co-signer can refuse. It can never take money. If the proposal falls short, nothing moves.

What you get, and what you don't

• Influence

  Your bitcoin only ever goes to a purchase you sign yourself. Nobody decides for you.

• A cause you believe in, funded

  A crowd that locks together can buy what none of its members could alone.

• Not a financial return

  Crowdlock is not a financial investment service. Nobody is paid a dividend, interest or a profit. Bitcoin's price rises and falls, and yours can be worth less when its lock ends.

The documents

The method is these six documents, not any piece of software. Each Crowdlock adds one of its own: a declaration saying what it is for.

• Registration formatWhat a membership record is: an address and a signature.
• Counting ruleHow every published figure is worked out from public data.
• Lock formatHow locked bitcoin is held, and the only two ways out.
• Proposals and settlementHow locked bitcoin is spent, and what happens when a proposal fails.
• Commitment formatHow one person backs one purchase.
• Destinations formatThe only addresses a proposal is allowed to pay.

What has been checked, and what hasn't

Don't take our word for any of it. The code and its tests are public.

• Checked. The lock, on a public test network

  26 October 2026. The owner alone before the date: refused. The co-signer alone: refused. Owner and co-signer together: accepted. The owner alone after the date: accepted.

• Checked. The app's wallet, on a private test chain

  Making a wallet, restoring it, sending, locking, taking a lock home after its date, and locking again.

• Checked. A purchase, start to finish, with test money

  November 2026, by hand. One proposal was funded and paid. Another fell short and was declared dead.

• Not yet. A review from outside

  Nobody outside this project has checked the code. Finding a flaw is the most useful thing you can do here.

• Not yet. Real bitcoin, start to finish

  One real lock exists so far, the founder's own. No real lock has been taken home yet, and no real purchase has been made.