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Sign in to OC Cosign

Start with Google, GitHub or your email and a one-time code. A Bitcoin wallet works too. One sign-in for every orangecheck site.

We email you a 6-digit code. No password, and no wallet needed to start. Add a Bitcoin address any time: a way in that only you hold.

OC Cosign never holds your keys and never takes custody of a single sat. Proving a Bitcoin address is an optional upgrade later, never required to get in.