# 10. Reading receipts

Completed JSON (wait, hook, or lookup):

```json
{
  "jobId": "…",
  "status": "completed",
  "sha256": "…",
  "receipts": [
    { "kind": "seal", "timestamp": "…", "certificate": "…", "blockIndex": 42 },
    { "kind": "metadata-attach", "attachedAt": "…", "publicMetadata": {} },
    { "kind": "tree-leaf", "merkleRoot": "…", "proof": [], "itemizedOnMainChain": false }
  ],
  "files": [{ "id": "invoice.pdf", "sha256": "…", "archiveId": "archive-b" }],
  "archivesQueried": true,
  "archiveReplies": 2
}
```

| `kind` | Meaning |
|--------|---------|
| `seal` | Chain certificate. If `of: merkleRoot`, this seal covers a batch, not the leaf itself. |
| `metadata-attach` | Public or private metadata added later. |
| `file-attach` | Off-chain file (content hash in the record). |
| `tree-leaf` | Inclusion proof for a hash that is not itemized on the main chain. |

**Verify Timestamp** takes a `certificate` string and returns `{ valid, timestamp, blockIndex }`. For a bulk leaf, verify the **root** certificate, then trust the leaf only if `proofOk` is true.