# ModelRegistry — 模型确权 + 见证人轮换

## 设计

* publisher 注册 modelHash + attestor 公钥地址
* attestor 是 EcdsaInferenceVerifier 信任的签名者
* publisher 可调用 setAttestor 轮换 attestor key

## 关键约束

* modelHash 全局唯一
* publisher 永久不可改
* attestor 可轮换（但旧 receipt 仍用旧 attestor 验签——history immutable）
* deactivate 模型 = isActive = false（旧 receipt 仍 valid）

## 接口

```solidity
function registerModel(bytes32 modelHash, address attestor, string contentURI)
function setAttestor(bytes32 modelHash, address newAttestor)
function deactivateModel(bytes32 modelHash)
function getAttestor(bytes32 modelHash) returns (address)
```

## 主网前必备

* attestor 私钥入 HSM / KMS
* multi-sig publisher 推荐（防单点失误）
* ZK swap (ZkmlInferenceVerifier 真 EZKL) 后 attestor 信任降级


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