<!-- source: https://secondlayer.tools/docs/api-reference#canonical-block-object -->

## The Canonical block object

One height of the canonical chain: the hash, its parent, and the Bitcoin anchor. Every row is canonical.

| Field | Type | Description |
| --- | --- | --- |
| `cursor` | string | `<block_height>:0`. Pass as `cursor`. |
| `block_height` | integer | Stacks block height. |
| `block_hash` | string | The block's hash. |
| `parent_hash` | string | The parent block's hash, to check linkage. |
| `burn_block_height` | integer | The Bitcoin block it anchors to. |
| `burn_block_hash` | string · nullable | That Bitcoin block's hash. |

```json
{
  "cursor": "9048503:0",
  "block_height": 9048503,
  "block_hash": "0x5560590afefe994adbe2188586a44ba3668e8964a7e64bb137c0df216531da0c",
  "parent_hash": "0x2a20974330e301b65086d3cde9b0006c9b7471479ba9a3fc2ca72621479655cc",
  "burn_block_height": 968276,
  "burn_block_hash": "0x000000000000000000019d25cd76d06a9eea796a906ac88300cd70fd70ccdb57"
}
```