Attestation Registry & Trust Federation

The Attestation Registry & Trust Federation RFP invites proposals to create a federated attestation registry that builds upon Ethereum’s attestation infrastructure. The funder is focused on strengthening Ethereum’s modular privacy stack by addressing fragmentation in attestation systems—especially for compliance-related use cases like KYC, proof-of-identity, TEE proofs, and zkTLS attestations. The initiative addresses the current lack of coordination among protocols that independently manage issuer registries, revocation mechanisms, and integration frameworks. By creating a shared yet decentralized trust layer, this project aims to reduce duplicative development, improve interoperability, and promote an open ecosystem for privacy-preserving attestations. The scope includes building a smart contract-based registry compatible with the Ethereum Attestation Service (EAS), indexing off-chain metadata, and supporting issuer onboarding via API. Additional features must include typed schema definitions, a trust tier system, revocation support with minimal on-chain footprint, and cross-chain attestation propagation. Projects that focus on centralized registry models, require protocol-specific integrations, store personal data on-chain, or lack governance/API structures are explicitly excluded from funding. At least two issuers must be onboarded in a demo, and the registry should work with at least two or three privacy protocols. The RFP prioritizes decentralized governance and neutrality. Proposals should include a roadmap for DAO-based or federated governance, and all code must be open-sourced under permissive licenses such as MIT or Apache 2.0. Strong emphasis is placed on sustainability and surveillance mitigation, with applicants asked to detail economic models for long-term operation and protections against misuse. The registry must serve as a metadata coordination layer, leaving proofs and data handling to individual protocols. Applications must demonstrate EAS integration or a compatibility roadmap, a functional revocation API, and working protocol adapters for interoperability with leading privacy protocols such as Railgun, Privacy Pools, or Blanksquare. Pilot deployments should showcase live issuer onboarding and cross-chain verification across networks like Ethereum and Arbitrum or Optimism. A published roadmap and early letters of support from institutional partners are encouraged to validate ecosystem demand. The application period opens on November 2, 2025, and closes on January 2, 2026. Projects are expected to span 3–6 months in duration. The funding structure is milestone-based, tied to key deliverables including registry architecture, EAS integration, issuer onboarding, and deployment. While total funding amounts are not pre-specified, they will align with the scope and complexity of the proposed solution. Proposals should include budget estimates, disbursement milestones, and risk mitigation strategies covering technical, governance, and adoption challenges.

Governance neutrality, EAS integration, and open-source licensing are emphasized.