NFTS RESEARCH DIGITAL IDENTITY

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Executive Summary

While NFTs are commonly associated with art and collectibles, their true potential extends into the realm of digital identity. This research focuses on how standards such as ERC-725 (Key-Value Identity) and ERC-735 (Claim Registry) enable NFTs to function as self-sovereign identity objects, with use-cases beyond ownership — toward verification, access control, and reputation.

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Background

The current Web2 identity systems rely on centralized accounts, opaque data, and external KYC processes. NFTs — especially Soulbound NFTs (non-transferable) — can represent verified, on-chain identity proofs or behavioral records, attached to an individual’s wallet in a verifiable way.

Standards such as ERC-725 and ERC-735 provide a programmable structure for identity and claims.

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Key Concepts

Concept	Description
ERC-725	Standard for key-value storage of identity attributes on-chain (name, email, role, etc.)
ERC-735	Mechanism to store and manage third-party claims about an identity (e.g., “KYC verified by X”)
NFT Identity Object	A non-transferable NFT that carries metadata linked to identity
Soulbound NFT	Non-transferable NFT bound to one wallet, ideal for identity or certificates

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Use-Cases in Web3 Ecosystems

1. Verifiable Web3 Resume → NFTs hold learning badges, skill endorsements, contributor history

2. Access Rights → Smart contract gates based on roles stored in ERC-725 NFT

3. Decentralized KYC → ERC-735 claims issued by third parties (auditors, DAOs, institutions)

4. Community Membership → Identity NFTs grant access to Discords, voting, or gated content

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Interoperability & Privacy Notes

• ERC-725 profiles are public by design → must limit sensitive fields

• Encryption layer (e.g., Lit Protocol) can add selective disclosure

• Multiple identities per user wallet can be deployed via NFT issuance from separate contracts

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Opportunities & Risks

Opportunity	Risk
Modular identity system interoperable across DAOs & DApps	Sensitive data exposure if poorly designed
Identity verification without central authority	Risk of false claims or sybil attacks
Reputation building in open ecosystems	Reputation can be gamed or sold

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Conclusion

ERC-725 and ERC-735 open new possibilities for NFTs to move beyond collectibles — toward verifiable, self-owned identity systems. By using NFTs as programmable identity objects, the Web3 ecosystem can build trust without compromising sovereignty.

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