# Obsero Smart Contract Specification

The smart contract anchors proof hashes on the Base blockchain.

## Functions

```solidity
function submitProof(bytes32 hash, string calldata cid, uint256 timestamp) external;
```

## Events

```solidity
event ProofSubmitted(address indexed observer, bytes32 hash, string cid, uint256 timestamp);
```

## Requirements

- The hash must match the signed JSON proof.
- CID must point to a valid IPFS document.
- Timestamps must be reasonable compared to block timestamp.