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Decentralized Identifier (DID)

A globally unique, self-sovereign identifier anchored on-chain. The user owns and controls their DID. No central authority can revoke or modify it. Each DID is published to its own consensus topic, making it independently resolvable by anyone. DIDs follow the W3C DID specification and serve as the foundation for all Soverage credentials. Format: did:hedera:testnet:z6Mk...

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Verifiable Credential (VC)

A W3C Verifiable Credential is a cryptographically signed digital proof. It contains:
  • The user’s DID
  • Their personhood score at the time of issuance
  • Completed attestation types
  • A cryptographic proof (Ed25519 signature)
  • A commitment hash linking to on-chain attestations
VCs are issued via the OID4VCI protocol and can be verified by any compatible system without contacting Soverage.

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Personhood Token

A non-transferable token minted on-chain.
  • One per person: maximum supply of 1 per verified user
  • Non-transferable: bound to the original wallet
  • On-chain: publicly verifiable on the ledger
  • Minimal metadata: wallet reference, personhood score, verification flag. No PII.

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Personhood score

A value from 0 to 100 reflecting the strength of the user’s identity proof, based on the number and type of attestations completed. Applications integrating with Soverage can define their own minimum score thresholds depending on the level of trust required.

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Attestations

Independent verification signals that build the user’s identity profile:
TypeMethod
Document (KYC)AI-powered document analysis
EmailOne-time code verification
PhoneSMS code verification
DeviceWebAuthn passkey/biometric
Social accountOAuth (e.g. Google)
Each attestation generates a cryptographic commitment (one-way hash) and is recorded on-chain. The original data (document image, email address, phone number) is discarded after verification. New attestation types may be added over time.

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Cryptographic commitments

Personal data is never stored. Instead, Soverage generates one-way hashes (commitments) that prove a verification occurred without revealing what was verified. This enables selective disclosure: users can prove claims about their identity without exposing the underlying data. All commitments are recorded on-chain and can be independently verified on any block explorer.