We architect and deploy audit-ready smart contracts that form the secure, immutable backbone of your application. Our development process is built on industry best practices and battle-tested patterns.
LABS
Services
Cross-Chain KYC Attestation Service
A service layer that issues signed, verifiable attestations of KYC status on one blockchain (e.g., Ethereum) for trustless acceptance by smart contracts on another (e.g., Solana, Avalanche).
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 experts for your DeFi, NFT, or enterprise application.
- Protocol Development: Custom
ERC-20,ERC-721,ERC-1155, and bespoke token standards. - DeFi & DAOs: Automated market makers (AMMs), staking pools, governance systems, and multi-sig vaults.
- Security First: Code follows
OpenZeppelinstandards and undergoes rigorous internal review before external audit.
Deliver a secure, functional MVP in as little as 2-3 weeks, accelerating your path to mainnet launch with confidence.
key-features-cards
ARCHITECTURE & SECURITY
Core Technical Capabilities
Our cross-chain KYC attestation service is built on a foundation of enterprise-grade security and interoperability, designed to integrate seamlessly into your existing compliance workflows.
03
Automated On-Chain Revocation
Real-time revocation of credentials via secure, permissioned smart contract calls. Maintains compliance with changing regulations and sanctions lists without manual intervention.
04
Gas-Optimized Verification
Lightweight, audited verification contracts minimize gas costs for dApps checking user status. Typically adds less than 50k gas to a transaction, preserving user experience.
benefits
TANGIBLE RESULTS
Business Outcomes for Your Platform
Our Cross-Chain KYC Attestation Service delivers measurable infrastructure advantages, enabling you to focus on growth while we handle compliance complexity.
01
Accelerated User Onboarding
Reduce KYC verification time from days to seconds. Our pre-verified attestations allow users to onboard across your multi-chain ecosystem with a single click, removing the primary friction point for adoption.
< 2 sec
Verification Time
90%+
Faster Onboarding
02
Regulatory Confidence
Deploy with confidence in 150+ jurisdictions. Our attestation framework is built on a legal opinion from Perkins Coie and is designed to be adaptable to evolving global AML/CFT standards, including FATF Travel Rule compliance.
150+
Jurisdictions
FATF
Travel Rule Ready
03
Reduced Compliance Overhead
Cut operational costs by outsourcing KYC/AML infrastructure. Eliminate the need for in-house compliance teams, manual review processes, and maintaining multiple vendor relationships for different chains.
70%
Lower OpEx
Zero
Manual Reviews
04
Seamless Multi-Chain Expansion
Launch on new networks in weeks, not months. Our service provides a unified KYC layer for Ethereum, Polygon, Arbitrum, Base, and other EVM chains, future-proofing your expansion strategy.
< 3 weeks
New Chain Integration
10+
Supported Networks
06
Enterprise-Grade Security & Uptime
Built on audited smart contracts with a 99.9% SLA. Our infrastructure undergoes regular penetration testing by Halborn and features multi-sig governance, ensuring reliability for institutional-grade applications.
99.9%
Uptime SLA
Halborn
Security Audits
Infrastructure Decision Matrix
Build vs. Buy: Cross-Chain KYC Portability
A technical and financial comparison of developing a custom KYC attestation bridge versus leveraging Chainscore's managed service.
| Factor | Build In-House | Chainscore Managed Service |
|---|---|---|
Time to Production | 6-12 months | 4-8 weeks |
Initial Development Cost | $250K - $500K+ | $50K - $150K |
Annual Maintenance & Ops Cost | $150K - $300K | Included in SLA |
Security Audit Burden | Your responsibility (high risk) | Pre-audited, continuously monitored |
Protocol & Chain Coverage | Limited to team expertise | Ethereum, Polygon, Arbitrum, Base, Solana, Avalanche |
Attestation Standard | Custom implementation | W3C Verifiable Credentials, EIP-712, Chainlink Functions |
Uptime & Reliability SLA | Self-managed (no guarantee) | 99.9% with financial backing |
Team Composition Required | 3-5 Sr. Blockchain Devs + DevOps | Your integration engineer + our team |
Regulatory Compliance Updates | Manual tracking & implementation | Automated, included in service |
Total 3-Year Cost of Ownership | $700K - $1.4M+ | $180K - $450K |
how-we-deliver
PROVEN FRAMEWORK
Our Delivery Methodology
We deliver a production-ready, secure KYC attestation layer in weeks, not months. Our systematic approach ensures compliance, interoperability, and seamless integration with your existing stack.
01
Discovery & Compliance Mapping
We analyze your target jurisdictions and user flows to map regulatory requirements (FATF Travel Rule, MiCA, etc.) to specific on-chain attestation logic. This ensures your cross-chain operations are compliant-by-design.
50+
Jurisdictions Mapped
1-2 weeks
Initial Scoping
02
Architecture & Smart Contract Development
Our engineers build custom, gas-optimized attestation registries and verifier contracts using Solidity 0.8+ and OpenZeppelin libraries. Contracts are designed for multi-chain deployment (EVM, Solana, Cosmos SDK).
100%
OpenZeppelin Audited
< 200k gas
Avg. Verification Cost
03
Security Audit & Formal Verification
Every attestation module undergoes rigorous internal review followed by a third-party audit from firms like Spearbit or Code4rena. Critical logic is formally verified to prevent identity spoofing and state corruption.
2+
External Audits
0 Critical
Guarantee on Launch
04
Cross-Chain Bridge Integration
We integrate your attestation layer with secure bridging protocols (Axelar, Wormhole, LayerZero) to enable KYC status portability. This includes custom message passing and state synchronization logic.
5+
Bridge Protocols
< 5 min
Status Sync Time
05
API & SDK Deployment
We deploy a managed API gateway and provide client SDKs (JS/TS, Python) for seamless integration into your frontend or backend. Includes rate limiting, monitoring, and automatic failover.
99.9%
API Uptime SLA
< 100ms
P95 Latency
security
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
We architect and deploy custom smart contracts on EVM and Solana that are secure, gas-optimized, and ready for mainnet. Our development process is built on OpenZeppelin standards and includes formal verification for critical logic.
Deliver a battle-tested MVP in 2-4 weeks, not months.
- Security-First Development: Every line undergoes peer review and static analysis with
Slither/MythXbefore our recommended third-party audit. - Full-Stack Integration: We provide the
ABIs, deployment scripts, and frontend SDKs (ethers.js/web3.js) for seamless integration. - Ongoing Support: Post-deployment monitoring, upgradeability patterns (
TransparentProxy), and incident response planning.
Cross-Chain KYC Attestation
Frequently Asked Questions
Get clear answers on how our KYC attestation service integrates with your multi-chain strategy, ensuring compliance without compromising user experience.
A user completes a one-time KYC verification with our certified partner. Upon approval, a verifiable, privacy-preserving attestation (ZK-proof or selective disclosure credential) is minted on-chain. This credential is recognized by your protocol across all supported chains, allowing the user to interact without repeating KYC. The process takes under 5 minutes for the user after initial verification.
ENQUIRY
Get In Touch
today.
Our experts will offer a free quote and a 30min call to discuss your project.
NDA Protected
Confidentiality24h Response
Time to ValueDirectly to Engineering Team
No Sales Fluff10+
Protocols Shipped
$20M+
TVL Overall