We architect and deploy production-grade smart contracts for tokens, DeFi protocols, and NFT ecosystems. Every contract is built with security-first principles, undergoes rigorous internal audits, and follows established patterns from OpenZeppelin and Solmate.
LABS
Services
ZK Credential Status Service
We build privacy-preserving credential revocation systems using zk-SNARKs/STARKs (e.g., on StarkNet). Prove a credential is valid without revealing its identifier or the revocation list.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, audited smart contracts built to your exact specifications and deployed on-chain.
- Custom Logic: From
ERC-20/ERC-721to complex DeFi mechanisms and DAO governance. - Full Lifecycle: Development, testing (
Foundry/Hardhat), deployment, and verification. - Security Guarantee: Multi-stage review process targeting common vulnerabilities before mainnet launch.
Reduce your time-to-market and technical risk with battle-tested code. We deliver contracts you can deploy with confidence in 2-4 weeks.
key-features-cards
ZK CREDENTIAL INFRASTRUCTURE
Core Technical Capabilities We Deliver
Our ZK Credential Status Service provides the foundational infrastructure for building privacy-preserving, verifiable identity and compliance systems. We deliver production-ready components that integrate seamlessly into your application stack.
benefits
DELIVERABLES
Business Outcomes for Your Platform
Our ZK Credential Status Service delivers concrete, measurable results that directly impact your platform's security, compliance, and user experience. Here's what you can expect.
01
Instant, Private Credential Verification
Enable users to prove credential validity (e.g., KYC, accreditation) without revealing the underlying data. We deliver a zero-knowledge proof system that integrates with your existing user flow, reducing verification friction to under 2 seconds.
< 2 sec
Verification Time
Zero-Data
Privacy Leakage
02
Regulatory Compliance with Developer Agility
Meet AML, KYC, and jurisdictional requirements without building complex compliance logic in-house. Our service abstracts the regulatory complexity, allowing your team to focus on core product features while we handle attestation proofs and status updates.
100%
Audit Trail
Global
Framework Support
03
Reduced Infrastructure & Legal Overhead
Eliminate the cost and liability of storing and managing sensitive PII (Personally Identifiable Information). By leveraging our decentralized status layer, you avoid data breach risks and the operational burden of credential databases.
$0
PII Storage Cost
90%
Compliance Dev Time
05
Enhanced User Trust & Onboarding Conversion
Build user confidence with transparent, privacy-preserving checks. A streamlined, secure verification process directly reduces sign-up drop-off and increases the quality of interactions in gated communities or financial services.
40%+
Lower Drop-off
Trustless
User Experience
06
Future-Proof Credential Revocation
Manage credential status (active/revoked/suspended) in real-time with cryptographic guarantees. Our service provides a secure, efficient revocation registry, ensuring your platform's policies are enforced without compromising user privacy.
Real-Time
Status Updates
On-Chain Proof
Enforcement
Technical Comparison
ZK Status Service vs. Traditional Revocation Methods
A detailed comparison of modern ZK-powered credential status verification against legacy centralized and on-chain methods, highlighting performance, cost, and privacy trade-offs.
| Feature | Centralized Servers (Legacy) | On-Chain Registries (CRL/OCSP) | Chainscore ZK Status Service |
|---|---|---|---|
Verification Latency | 100-500ms | 2-30 seconds (block time) | < 100ms |
User Privacy Leakage | High (server sees all queries) | High (status public on-chain) | Zero (ZK proofs reveal nothing) |
Infrastructure Cost | $$$ (scaling servers/CDN) | $$$$ (high gas fees per update) | $ (fixed API cost) |
Revocation Update Speed | Instant | Slow (next block) | Instant (off-chain), proven on-demand |
Censorship Resistance | None (central point of failure) | High (immutable ledger) | High (decentralized prover network) |
Developer Integration | Simple REST API | Complex smart contract calls | Simple REST API + SDK |
Auditability & Proof | Trust-based logs | Transparent on-chain record | Cryptographic ZK proof per check |
SLA & Uptime Guarantee | Varies (your responsibility) | Depends on chain uptime | 99.9% with monitoring |
Estimated Annual Cost for 1M checks | $10K - $50K | $50K - $200K+ (gas) | $5K - $15K |
how-we-deliver
A PROVEN FRAMEWORK
Our Development & Integration Process
We deliver production-ready ZK credential infrastructure through a structured, transparent process designed for technical teams. From initial design to ongoing support, our focus is on security, speed, and seamless integration.
01
Architecture & Protocol Design
We design your credential schema and issuance flow, selecting the optimal ZK proving system (e.g., Circom, Halo2) and blockchain layer (EVM L2, Solana) based on your privacy, cost, and performance requirements.
2-4 weeks
Design Phase
3+ Options
Architecture Reviewed
02
Circuit Development & Auditing
Our cryptographers implement and rigorously test the zero-knowledge circuits. Every circuit undergoes internal review and is prepared for formal security audits by partners like Trail of Bits or Spearbit.
100%
Code Coverage
Formal Audit
Security Standard
03
Smart Contract Integration
We deploy the verifier contracts and build the on-chain status registry (revocation, expiration). Contracts are built with OpenZeppelin standards and include gas optimization for high-volume use cases.
< 1 week
Avg. Deployment
OpenZeppelin
Security Foundation
04
SDK & API Development
Receive a tailored SDK and REST/GraphQL APIs for credential issuance, proof generation, and verification. Includes comprehensive documentation and code samples for your engineering team.
TypeScript/Go
SDK Languages
Full Docs
Included
05
Staging & Load Testing
We deploy to a staging environment matching production specs. The system undergoes load testing to verify performance under target transaction volumes and stress scenarios.
10k+ TPS
Load Tested
Staging Env
Client Access
06
Production Deployment & Support
We manage the mainnet deployment and provide ongoing monitoring, alerting, and maintenance. Includes a 99.9% uptime SLA and dedicated technical support for your team.
99.9%
Uptime SLA
24/7
Monitoring
use-cases
ENTERPRISE-GRADE INTEGRATIONS
Primary Applications We Build For
Our ZK Credential Status Service provides the critical infrastructure layer for applications requiring verifiable, private, and instantly-updatable user credentials. We build for these core use cases.
02
Sybil-Resistant Airdrops
Distribute tokens to unique, verified humans with zero-knowledge proofs. We implement credential-based gating to prevent bot farms and ensure fair distribution, protecting your tokenomics.
> 99.9%
Sybil Detection
ERC-4337
Account Abstraction
03
Private Credit Scoring
Build DeFi lending protocols with underwriting based on off-chain credit data. Borrowers can prove a score threshold or repayment history via a ZK proof, without revealing their identity or raw data.
ZK-SNARKs
Proof System
Real-time
Status Revocation
05
Cross-Chain Identity Portability
Allow users to carry their verified credentials seamlessly across EVM and non-EVM chains. Our service provides a unified status layer, eliminating redundant KYC processes per chain.
EVM + Solana
Chain Support
CCIP Read
Interop Standard
ZK Credential Status Service
Frequently Asked Questions
Get clear answers on how our ZK credential infrastructure works, from implementation to security.
Our service provides a decentralized, privacy-preserving infrastructure for issuing and verifying off-chain credentials. Issuers sign credentials with their private key, which are stored off-chain by the user. When verification is needed, users generate a zero-knowledge proof that cryptographically confirms the credential's validity and current status (e.g., not revoked) without revealing the credential data itself. Our smart contracts maintain a minimal on-chain state—like a Merkle root of the revocation registry—enabling trustless verification with on-chain gas costs as low as ~50k gas per check.
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