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For the complete documentation index, see llms.txt. This page is also available as Markdown.

Overview

CapSign uses decentralized identity and attestations built on Ethereum Attestation Service (EAS).

What is Identity on CapSign?

Identity on CapSign consists of:

  • KYC Verification - Identity verification through Persona (via Bridge.xyz)

  • Attestations - Privacy-preserving credentials on Ethereum Attestation Service

  • Accreditation - Issuer-verified attestations for investment qualifications

Key Concepts

Attestations

An attestation is a cryptographic credential that proves something about you:

  • Stored on-chain via Ethereum Attestation Service

  • Privacy-preserving (no personal data on-chain)

  • Portable (use across platforms)

  • Revocable (if needed)

KYC vs. Attestations

KYC (via Persona):

  • Full identity verification

  • Personal information collected

  • Stored off-chain

  • Results in attestation

Attestations (on EAS):

  • Cryptographic proof only

  • No personal data

  • Stored on-chain

  • Verifiable by smart contracts

Types of Attestations

1. KYC Attestation

Proves you've completed identity verification.

Contains:

  • Wallet address

  • Verification status

  • Verification date

  • Issuer (CapSign via Bridge.xyz/Persona)

Required for:

  • Investing in offerings

  • Creating offerings (entity KYC)

  • Certain platform features

Learn more: Persona Verification

2. Accreditation Attestation

Proves you're an accredited investor.

Issued by:

  • Issuers (after reviewing documentation)

  • Verification services

  • Self-attestation (in some jurisdictions)

Required for:

  • Reg D 506(c) offerings

  • Other accredited-only investments

Learn more: Accreditation

3. Custom Attestations

Other credentials issuers may require:

  • Qualified Purchaser status

  • Professional investor credentials

  • Jurisdiction verification

  • Employment verification

For Investors

Getting Started

  1. Create Account - 30 seconds, no email required

  2. Explore Platform - Browse offerings, learn about features

  3. Complete KYC - When ready to invest

  4. Get Attestations - As needed for specific investments

KYC Process

  1. Navigate to Settings → Verification

  2. Complete Persona verification (via Bridge.xyz)

  3. Provide ID and basic information

  4. Receive KYC attestation (1-5 minutes)

Accreditation

If investing in accredited-only offerings:

  1. Contact issuer with documentation

  2. Issuer reviews and verifies

  3. Issuer issues accreditation attestation via CapSign UI

  4. Attestation available immediately

For Issuers

Verifying Investors

Check investor attestations:

  • View investor profile

  • See all attestations

  • Verify on EAS

  • Check expiration and revocation status

Issuing Attestations

Issue accreditation attestations:

  1. Navigate to admin panel

  2. Select investor

  3. Choose attestation type (Accredited Investor, etc.)

  4. Sign and issue on-chain

  5. Investor receives immediately

Learn more: Accreditation

Privacy

What's On-Chain

Only attestation metadata:

  • Wallet address

  • Attestation type

  • Issuer

  • Timestamp

  • Expiration (if any)

What's Off-Chain

Personal information:

  • Name

  • Address

  • ID documents

  • Financial information

Personal data never goes on-chain.

Technical Details

Ethereum Attestation Service

CapSign uses EAS for all attestations:

  • Schema-based - Each attestation type has a schema

  • On-chain - Recorded on Base blockchain

  • Verifiable - Anyone can verify

  • Revocable - Can be revoked if needed

Attestation Schemas

KYC Schema:

  • Wallet address

  • Verification level

  • Provider (Persona/Bridge.xyz)

  • Timestamp

Accreditation Schema:

  • Wallet address

  • Qualification type

  • Issuer address

  • Expiration date

  • Supporting documentation hash

Verification in Smart Contracts

Offerings check attestations automatically:

Best Practices

For Investors

  • Complete KYC early - Don't wait until you want to invest

  • Keep attestations current - Renew before expiration

  • Verify issuer - Only accept attestations from trusted issuers

  • Protect privacy - Share attestations only when needed

For Issuers

  • Verify thoroughly - Check documentation carefully before issuing

  • Document everything - Keep records of verification

  • Set expirations - Require periodic re-verification

  • Revoke if needed - Revoke attestations if circumstances change

FAQs

Q: Do I need KYC to create an account? A: No. KYC only required for investing.

Q: How long does KYC take? A: 1-5 minutes for automated verification. Up to 24 hours if manual review needed.

Q: Can I invest without KYC? A: No. All investments require KYC verification.

Q: Who can see my attestations? A: Attestations are public on-chain, but contain no personal information. Only attestation metadata is visible.

Q: Can attestations be revoked? A: Yes. Issuers can revoke attestations if needed.

Q: Are attestations transferable? A: No. Attestations are tied to your wallet address.

Guides

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