We architect and deploy custom smart contracts that are secure, gas-optimized, and tailored to your specific business logic. Our development process is built on Solidity 0.8+ with OpenZeppelin standards and includes comprehensive unit testing.
LABS
Services
ZK Cross-Chain Data Attestation Service
Build oracle-like services that generate zero-knowledge proofs for real-world and on-chain data. We deliver secure, verifiable data attestations for consumption by smart contracts on any connected chain.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
From tokenization (ERC-20/721) to complex DeFi protocols, we deliver contracts you can trust for mainnet deployment.
- Security-First Process: Multi-stage audits, formal verification, and battle-tested design patterns.
- Full Lifecycle Support: Development, deployment, verification, and upgrade management via Transparent Proxies.
- Measurable Outcomes: Reduce development time by 60% and achieve 99.9% uptime SLA post-launch.
key-features-cards
PRODUCTION-READY INFRASTRUCTURE
Core Capabilities of Our ZK Attestation Service
Our service delivers verifiable, trust-minimized data bridges between any blockchain, enabling secure cross-chain applications without centralized intermediaries.
benefits
TANGIBLE ROI FOR WEB3 BUSINESSES
Business Outcomes: Why Build with Verifiable Data
ZK Cross-Chain Data Attestation isn't just a technical feature—it's a business enabler. Here's how verifiable data directly impacts your product's growth, security, and market position.
01
Instant Cross-Chain Liquidity Access
Enable your DeFi protocol to source liquidity from any chain without bridging delays or trust assumptions. Our attestations provide real-time, verified proof of assets, allowing for immediate collateralization and yield strategies across ecosystems.
< 2 sec
Attestation Latency
10+ Chains
Supported Networks
02
Regulatory & Compliance Readiness
Build with built-in compliance. Generate immutable, cryptographically-verifiable proof of transactions and asset provenance. This audit trail is essential for financial regulations (like Travel Rule), institutional adoption, and enterprise due diligence.
FATF Compliant
Data Standard
Immutable
Audit Trail
03
Eliminate Oracle Risk & Manipulation
Replace vulnerable price oracles with mathematically-verifiable state proofs. Secure your lending protocols, derivatives, and insurance products from flash loan attacks and data manipulation by sourcing truth directly from source chain consensus.
ZK-Proof
Security Foundation
Source Chain
Data Origin
04
Unlock New Product Verticals
Launch previously impossible products like cross-chain credit scoring, under-collateralized lending with portable reputations, or verifiable RWA (Real World Asset) fractionalization. Attested data is your new primitive.
0→1
Product Launch
New Markets
Addressable Audience
05
Radically Reduce Integration Time
Go from weeks to hours. Our unified API for verifiable data across Ethereum, Solana, Polygon, and other L2s eliminates the need to build and maintain custom cross-chain relayers and light clients for each integration.
80% Faster
Integration Speed
Single API
Development Surface
06
Future-Proof Architecture
Build on a data layer that abstracts away chain fragmentation. As new L1s and L2s emerge, your application automatically gains access, ensuring your product isn't siloed to a single ecosystem's growth curve.
Chain-Agnostic
Design
Auto-Updated
Network Support
use-cases
ENTERPRISE USE CASES
Applications Powered by ZK Data Attestation
ZK Data Attestation enables verifiable, private data sharing across blockchains. We build custom attestation systems that solve critical business challenges for FinTechs and Web3 companies.
01
Cross-Chain Compliance & KYC
Securely share verified KYC/AML status across EVM and non-EVM chains without exposing sensitive user data. Eliminate redundant checks and enable compliant multi-chain user onboarding.
Deliverables: Custom attestation circuits, integration with compliance providers (e.g., Synaps, Fractal), and on-chain verification modules.
Zero-Knowledge
Data Privacy
Multi-Chain
Supported
02
Institutional-Grade Asset Bridging
Enable secure, auditable transfers of tokenized RWAs (Real World Assets) and high-value NFTs between chains. Our attestations provide cryptographic proof of asset provenance and custody status for institutional partners.
Deliverables: Custom bridging logic with ZK proofs, on-chain state verification, and integration with custodians like Fireblocks or Copper.
Cryptographic Proof
Asset Provenance
Institutional
Custody Ready
03
Decentralized Identity & Reputation
Build portable, private user identities and reputation scores that work across DeFi, gaming, and social dApps. Users control their data while protocols access verified credentials.
Deliverables: ZK attestation schemas for credentials (e.g., World ID, Gitcoin Passport), on-chain verification contracts, and SDKs for dApp integration.
User-Controlled
Data Sovereignty
Portable
Cross-dApp
04
Secure Oracle Data Feeds
Create tamper-proof, verifiable data feeds from off-chain sources (APIs, IoT) to any blockchain. Prove data authenticity and freshness without revealing the raw source, protecting proprietary data.
Deliverables: Custom ZK oracle circuits, data attestation pipelines, and on-chain verification contracts compatible with Chainlink or Pyth.
Tamper-Proof
Data Integrity
Source Privacy
Protected
05
Interoperable Gaming & Metaverse Assets
Enable true asset interoperability between gaming ecosystems and metaverse platforms. Prove ownership and attributes of in-game items across chains without centralized bridges.
Deliverables: Cross-chain NFT attestation protocols, attribute verification circuits, and SDKs for Unity/Unreal Engine integration.
True Ownership
Proven On-Chain
Multi-Platform
Interoperability
06
Private Enterprise Data Sharing
Facilitate confidential data collaboration between enterprises (e.g., supply chain partners, financial institutions) using blockchain as a verifiable, neutral ledger without exposing business secrets.
Deliverables: Private consortium attestation networks, custom ZK circuits for business logic, and enterprise-grade API gateways.
Confidential
Business Logic
Consortium Ready
Architecture
Technical & Economic Comparison
ZK Attestation vs. Traditional Oracle Models
A direct comparison of Chainscore's ZK-based data attestation service against conventional oracle solutions, highlighting key differences in security, cost, and performance for CTOs evaluating infrastructure.
| Evaluation Criteria | Traditional Oracle (e.g., Chainlink) | Chainscore ZK Attestation |
|---|---|---|
Data Integrity Guarantee | Trusted Committee / Reputation | Cryptographic Proof (ZK-SNARK) |
Trust Assumption | Trust in 3rd-party node operators | Trustless (verifiable on-chain) |
Attack Surface | High (targets node consensus) | Low (targets cryptographic proof) |
Cross-Chain Data Latency | 3-12 seconds | < 2 seconds |
Cost per Data Point (Est.) | $0.10 - $0.50 | $0.02 - $0.10 |
Time to Integrate | 2-4 weeks | 1-2 weeks |
Custom Logic Support | Limited (pre-defined feeds) | Full (custom ZK circuit dev) |
Audit & Compliance Readiness | External audit required | Inherently verifiable design |
Total Cost of Ownership (Year 1) | $50K - $200K+ | $25K - $100K |
Recommended For | Standard price feeds, low-risk data | High-value transfers, custom logic, regulatory compliance |
how-we-deliver
PREDICTABLE, TRANSPARENT, AND SECURE
Our Delivery Process: From Specification to Mainnet
We deliver production-ready ZK attestation systems through a structured, milestone-driven process. Get a clear timeline, fixed deliverables, and expert execution from day one.
01
1. Discovery & Architecture
We conduct a technical deep dive to define your attestation logic, data sources, and target chains. You receive a detailed technical specification and a project roadmap with clear milestones.
1-2 weeks
Specification Phase
Fixed Scope
No Scope Creep
02
2. Circuit Design & Development
Our cryptographers translate your logic into optimized Zero-Knowledge circuits using Circom or Halo2. We implement on-chain verifiers for Ethereum, Polygon, or your chosen L2.
Circom/Halo2
Proven Frameworks
Gas-Optimized
Verifier Contracts
04
4. Integration & Deployment
We handle the full deployment pipeline: deploying verifiers, setting up relayer infrastructure, and integrating the attestation flow into your dApp's front-end and back-end.
Managed Relayer
Infrastructure
Mainnet Ready
Full Deployment
05
5. Monitoring & Support
Post-launch, we provide real-time monitoring of proof generation, chain state, and relayer health. Includes 24/7 incident response and performance optimization support.
99.9% SLA
Uptime Guarantee
24/7
Support Coverage
ZK Cross-Chain Data Attestation
Frequently Asked Questions
Get clear answers on how our ZK-powered attestation service works, from integration to security.
ZK Cross-Chain Data Attestation uses zero-knowledge proofs to cryptographically verify and attest to the state of data (e.g., balances, ownership, transaction history) from one blockchain on another. You need it to build secure, trust-minimized cross-chain applications like asset bridges, lending protocols, and governance systems without relying on centralized oracles or multisigs. It provides cryptographic guarantees that the data you're using is valid and current.
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