cosign means getting behind someone.
A builder posts what they’re making and what they need — a co-founder, capital, or both. Everyone else can cosign it. There are three ways to do that, and none of them ask OC to hold your money or your keys.
join
co-foundersYou want to help build it. Express interest as a co-founder. When the founder is interested too, a private intro opens and you take it from there — roles, equity, commitment, all on your own terms, off-platform.
back
backers & patronsYou want to put capital or weight behind it. Back the project. Any sats settle peer-to-peer over Lightning, straight to the founder’s own address. OC is never in the money flow and holds nothing.
zap
everyoneYou just want to say “I’m behind this.” Send a small Lightning tip as a lightweight gesture of conviction. No commitment, no flow — the warmest way to get behind a builder.
what we promise
your identity is your Bitcoin identity
No password, no résumé, no LinkedIn. You sign in with your OrangeCheck identity — the same one across every .ochk.io product. That’s what keeps the room full of real people instead of noise.
start with an email — the badge is optional
Non-technical founders welcome. Get in with just an email and a one-time code. Later, if you want, prove control of a Bitcoin address to earn a “verified Bitcoiner” badge. It’s an upgrade, never a gate.
OC Cosign is not a securities platform. Joining a team and backing a builder with sats are acts of support — not a regulated investment offering. Any equity conversation happens directly between you and your co-founder, off OC Cosign. We keep it simple, human, and non-custodial on purpose.