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How Do On-Chain Identity Solutions Interact with Compliance-Focused Token Standards like ERC-3643?

On-chain identity solutions, such as verifiable credentials or decentralized identifiers (DIDs), attest to a wallet address's real-world identity and compliance status (e.g. KYC/AML complete).

The token standard's smart contract then references this on-chain identity registry to verify if an address is authorized to hold or transact the token before allowing a transfer to execute.

How Does a Token Standard like ERC-20 Differ from ERC-721?
What Is the Purpose of the “Approve” Function in the ERC-20 Standard?
What Is the Key Advantage of a Tokenized Option Being an ERC-721 (NFT) versus an ERC-20?
What Are the Key Differences between ERC-721 and the Newer ERC-1155 Standard?