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Free 30-min Web3 Consultation
Book Consultation
Smart Contract Security Audits
View Audit Services
Custom DeFi Protocol Development
Explore DeFi
Full-Stack Web3 dApp Development
View App Services
Free 30-min Web3 Consultation
Book Consultation
Smart Contract Security Audits
View Audit Services
Custom DeFi Protocol Development
Explore DeFi
Full-Stack Web3 dApp Development
View App Services
Free 30-min Web3 Consultation
Book Consultation
Smart Contract Security Audits
View Audit Services
Custom DeFi Protocol Development
Explore DeFi
Full-Stack Web3 dApp Development
View App Services
LABS
Services

Zero-Knowledge Cross-Chain Attestations

Deploy systems that generate ZK-SNARK/STARK proofs of identity credentials on one blockchain for trustless, private verification on any other chain. Built for interoperability and compliance.
Chainscore © 2026
overview
CORE SERVICE

Smart Contract Development

Secure, production-ready smart contracts built by Web3 experts to power your protocol.

We architect and deploy custom smart contracts for DeFi, NFTs, and enterprise applications. Our team delivers audit-ready code using Solidity 0.8+ with OpenZeppelin standards, ensuring security and gas efficiency from day one.

From concept to mainnet, we manage the full lifecycle with a focus on security-first development and rapid iteration.

  • Custom Logic: Tailored ERC-20, ERC-721, and complex DeFi primitives (AMMs, staking, governance).
  • Security & Audits: Rigorous internal review and preparation for third-party audits from firms like Trail of Bits or CertiK.
  • Gas Optimization: Minimize transaction costs with efficient contract architecture and deployment strategies.
  • Full Deployment: End-to-end support from testnet (Goerli, Sepolia) to mainnet (Ethereum, Polygon, Arbitrum).
key-features-cards
ZK-POWERED INFRASTRUCTURE

Core Technical Capabilities We Deliver

We build the foundational ZK attestation layer that enables secure, trust-minimized communication between any blockchain. Our battle-tested solutions are designed for production at scale.

01

Custom ZK Circuit Design

We design and implement custom zero-knowledge circuits for your specific cross-chain logic, using Plonk, Groth16, or Halo2. This ensures minimal proof sizes and verification costs for your unique attestation needs.

~5-10KB
Avg. Proof Size
< 100ms
On-chain Verify
02

Multi-Chain State Proof Generation

Our provers generate succinct proofs of state (e.g., account balances, transaction inclusion) from source chains like Ethereum, Solana, and Cosmos. We handle the complexity of light clients and RPC reliability.

15+ Chains
Supported
Sub-second
Proof Gen
03

High-Availability Prover Network

Deploy with a decentralized network of high-performance provers for fault tolerance and censorship resistance. We manage node orchestration, load balancing, and automatic failover.

99.9%
Uptime SLA
Geo-redundant
Infrastructure
04

On-Chain Verifier Contracts

We deploy and maintain gas-optimized verifier smart contracts on your target chains (EVM, SVM, Move). Contracts are built with Solidity 0.8+ or Rust, using OpenZeppelin patterns and undergo formal verification.

< 200k Gas
Avg. Verify Cost
Audited
Code Security
05

Attestation Relayer & API

A managed service that submits proofs, monitors chain state, and provides a simple REST/WebSocket API for your application to query attestation status and trigger cross-chain actions.

< 1 sec
API Latency
24/7
Monitoring
06

Security & Audit Integration

Our development process includes integration with leading audit firms. We provide comprehensive documentation, test suites with >95% coverage, and facilitate third-party audits from firms like Trail of Bits or Quantstamp.

>95%
Test Coverage
Formal Specs
Deliverable
benefits
DELIVERABLES

Business Outcomes for Your Product

Our Zero-Knowledge Cross-Chain Attestations service delivers concrete, measurable results for your product's go-to-market and operational efficiency.

01

Accelerated Time-to-Market

Deploy production-ready, audited ZK attestation circuits in under 4 weeks. We provide a complete integration package, eliminating months of R&D and allowing you to launch new cross-chain features faster than competitors.

< 4 weeks
To Production
0 lines
Circuit Code You Write
02

Provable Security & Compliance

All ZK circuits and smart contracts undergo formal verification and audits by firms like Trail of Bits or Quantstamp. This provides the cryptographic proof and audit trail required for institutional adoption and regulatory compliance.

100%
Formally Verified
Tier-1
Audit Partners
03

Substantial Cost Reduction

Reduce your cross-chain messaging costs by over 90% compared to traditional optimistic bridges. Our ZK proofs minimize on-chain verification gas, turning a major operational expense into a competitive advantage.

> 90%
Gas Cost Reduction
$0.01
Avg. Proof Cost
04

Enhanced User Experience

Enable instant, trust-minimized asset transfers between chains with sub-2 second finality after confirmation. Remove bridging wait times and uncertainty, directly improving user retention and transaction volume.

< 2 sec
Finality Time
1-Click
User Flow
05

Future-Proof Architecture

Build on a modular ZK attestation layer compatible with Ethereum, Arbitrum, Polygon, and Base. Our circuits are designed for easy upgrades, ensuring your infrastructure adapts to new chains and standards without rewrites.

4+
Chains Supported
Modular
Design
06

Enterprise-Grade Reliability

Guaranteed 99.95% uptime SLA for the prover network and monitoring suite. We provide 24/7 incident response and detailed analytics dashboards, ensuring your cross-chain operations have institutional-grade reliability.

99.95%
Uptime SLA
24/7
Monitoring
Choose Your Implementation Path

Structured Development Pathways

Compare our tiered service packages for implementing Zero-Knowledge Cross-Chain Attestations, designed to match your project's stage, security requirements, and operational needs.

Feature / DeliverableProof-of-ConceptProduction-ReadyEnterprise Scale

Custom ZK Circuit Design & Audit

On-Chain Verifier Smart Contracts

Basic (1 Chain)

Multi-Chain (Up to 3)

Unlimited Chain Support

Attestation Relay Infrastructure

Integration Support (SDK/API)

Documentation Only

Guided Implementation

Dedicated Technical Lead

Uptime & Performance SLA

99.5%

99.9%

Incident Response Time

Best Effort

< 12 Hours

< 1 Hour

Ongoing Maintenance & Upgrades

Optional Retainer

Included with Quarterly Reviews

Estimated Timeline

4-6 Weeks

8-12 Weeks

Custom (12+ Weeks)

Typical Investment

$30K - $60K

$120K - $250K

Custom Quote

how-we-deliver
PROVEN METHODOLOGY

Our Development & Integration Process

A structured, security-first approach to integrating ZK-powered cross-chain attestations into your application, ensuring reliability and accelerating your time-to-market.

01

Architecture & Protocol Design

We design a custom attestation architecture tailored to your use case, selecting optimal ZK circuits (e.g., Plonk, Groth16) and target chains (EVM, Solana, Cosmos). This phase defines the security model and economic guarantees.

2-4 weeks
Design Phase
5+
Protocols Supported
02

Circuit Development & Optimization

Our cryptographers implement and optimize the zero-knowledge circuits that power your attestations, focusing on proof generation speed and verification cost. We deliver auditable, gas-efficient circuits ready for production.

< 2 sec
Avg. Proof Gen
~$0.05
Avg. Verify Cost
03

Smart Contract & Relayer Deployment

We deploy the on-chain verifier contracts and off-chain attestation relayers. Contracts are built with OpenZeppelin standards and undergo rigorous testing and formal verification before mainnet deployment.

99.9%
Relayer Uptime SLA
48 hrs
Mainnet Deployment
05

Security Audit & Formal Verification

Every component—from ZK circuits to smart contracts—undergoes independent security review by firms like Trail of Bits or Quantstamp. We provide a public audit report to build trust with your users.

100%
Code Coverage
Tier-1
Audit Partners
06

Monitoring, Maintenance & Scaling

We provide ongoing monitoring dashboards for attestation volume, latency, and costs, with proactive alerts. Our team manages upgrades and scaling to handle increased throughput as your application grows.

< 5 min
Issue Response
10k+ TPS
Scalability Target
Zero-Knowledge Cross-Chain Attestations

Frequently Asked Questions

Get clear answers on how our ZK-powered attestation service works, from security to integration.

Zero-Knowledge Cross-Chain Attestations are cryptographic proofs that verify a statement (e.g., a user's asset ownership or transaction history on Chain A) is true, without revealing the underlying data, and make that proof verifiable on Chain B. We build the infrastructure that generates, relays, and verifies these ZK proofs, enabling secure, private, and trustless interoperability between different blockchains.

ENQUIRY

Get In Touch
today.

Our experts will offer a free quote and a 30min call to discuss your project.

NDA Protected
24h Response
Directly to Engineering Team
10+
Protocols Shipped
$20M+
TVL Overall
NDA Protected Directly to Engineering Team
Zero-Knowledge Cross-Chain Attestations | Chainscore Labs | ChainScore Guides