CoSigned is a dual-signature mentorship protocol. Mentor and learner co-sign a Bond on-chain. When both sign, a soulbound NFT is minted to each — proof that can never be faked, transferred, or revoked.
Defines the skill, success criteria, and deadline. Evidence is uploaded to IPFS before the Bond goes on-chain.
Stakes ETH as a commitment signal. The stake is held in the contract and refunded in full on completion.
The real mentorship — calls, code reviews, projects. All off-chain. The Bond holds the record.
Either party signs first. The second signature completes the Bond. Neither can fake it alone.
A soulbound credential is minted to both wallets. Permanent, non-transferable, verifiable on-chain.
Both signatures are required. The smart contract enforces it — no platform, no admin, no override.
2-of-2
signatures required
Soulbound NFTs cannot be transferred or deleted. The credential lives on Base for as long as the chain does.
ERC-5192
soulbound standard
Every Bond is public on BaseScan. Anyone can verify a mentorship happened — no institution required.
On-chain
fully transparent
Connect your wallet and start a Bond today.