Blue Badge
The Blue Badge is a soul-bound NFT on Base awarded to Trust IDs with a Trust Score above the verification threshold — a cryptographic blue checkmark.
The TrustLayer Blue Badge is a non-transferable ERC-5192 SBT minted only after peer verification. Unlike social-network checkmarks that can be purchased or revoked politically, the Blue Badge is math — earned via real humans vouching for you.
Related terms
Trust ID
A Trust ID is a wallet-verified, human-readable handle (like @alice) linked to a Merkle-anchored on-chain identity on Base.
Trust Score
Trust Score is a 0–1000 number computed from peer vouches, streaks, and on-chain activity — a portable reputation metric anchored to your wallet on Base.
Soul-Bound Token (SBT)
A Soul-Bound Token is an NFT that cannot be sold or transferred. TrustLayer issues SBTs for badges, vouches, and streak milestones so reputation cannot be bought.