Verification Phase

After the zk-proof is generated by the executor, it must be validated on-chain. This step is performed by a Verifier Smart Contract on Ethereum, ensuring that:

• The model used is authorized and registered,

• The input/output are consistent with the request,

• The zk-proof is cryptographically correct.

Only upon successful verification can any payment or downstream logic (like RWA royalty distribution) be triggered.

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🔐 Verifier Responsibilities:

Step	Action
1. Retrieve InferenceRequest	Based on request ID or hashes
2. Load model verifier key	From zkRegistry or verifier reference
3. Validate zk-proof	Using the on-chain verifier logic
4. Confirm input_hash + output_hash	Must match expected values from the job
5. Emit verification event	Confirmation event used by settlement, dashboards, and RWA logic

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📦 Verified Inference Struct:

struct VerifiedInference {
  bytes32 request_id;
  bytes32 model_hash;
  bytes32 proof_hash;
  bytes32 input_hash;
  bytes32 output_hash;
  uint64 verified_at;
}

All fields are cryptographically enforced and emitted in a verification log, allowing trustless downstream automation.

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🧠 zk-Proof Systems Supported:

• Halo2, Groth16, Plonk (modular verifier contracts)

• Verifier addresses are registered per model in the zkRegistry

• Supports both monolithic and recursive circuits

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🌍 RWA Integration:

• Verification = Revenue Activation: RWA-linked models/agents receive payment only after successful proof verification.

• Immutable Traceability: Logs can be queried to track real-world asset performance and yield events.

• Regulatory Alignment: Provides cryptographic evidence of every monetized AI action — auditable and timestamped.

The verifier contract is not just a filter — it’s the gatekeeper of revenue in a cryptographically enforced AI economy.