CryptoProof is an easy way to generate proof you own a specific bitcoin wallet by signing a message with the wallet's private key. When you sign a message with a private key it generates a signature.
You can also use CryptoProof to verify someone else's ownership of a specific wallet address. You can combine a wallet address (aka a public key), the message, and compare it to a signature supplied by the individual in question. The verifier will return either true or false (verified or unverified, respectively).
If someone proves ownership to me by giving me a wallet address, a message, and a signature, can't I turn around and go "prove" to someone else I own that wallet address?
Yes, you could try, but they would correctly not accept it as proof if they understands how hashing works. The verifying party should always supply their own unique message when asking for proof of ownership.
I welcome any contributions, enhancements, and bug-fixes. File an issue on GitHub and submit a pull request.
To build the project locally on your computer:
Clone this repo
git clone https://github.com/brennerspear/cryptoproof.git
Generate dist file
make build
open in your browser
open index.html
To watch files and generate sourcemaps for developing
make watch
CryptoProof is 100% free and open-source, under the MIT license. Use it however you want.