> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cowboy.inc/llms.txt
> Use this file to discover all available pages before exploring further.

# E1619 — Measurement binding registration requires a verified chip-root proof

> Measurement binding registration requires a verified chip-root proof

# E1619 — Measurement binding registration requires a verified chip-root proof

| Property | Value |
| - | - |
| **Code** | `1619` |
| **Slug** | `E1619` |
| **Category** | `runner` (Runner / Consensus) |
| **CIP** | CIP-23 §3.6 |

## What happened

Measurement binding registration requires a verified chip-root proof.

This is the receipt's `what` text, produced by the node's `ExecutionError::ChipRootProofRequired`.

## Why it happened

The node rejected the operation with `E1619` (category `runner`, Runner / Consensus). The receipt's `why` field carries the specific cause and `context` carries structured details, when the emitter attaches any.

The normative rule is in CIP-23 §3.6.

## How to fix

Complete chip-root SNARK verification before registering a non-Nitro measurement binding. The default build supports Nitro registration through on-chain attestation verification.

## Receipt example

```json theme={null}
{
  "code": 1619,
  "slug": "E1619",
  "category": "runner",
  "what": "measurement binding registration requires a verified chip-root proof",
  "fix": "Complete chip-root SNARK verification before registering a non-Nitro measurement binding. The default build supports Nitro registration through on-chain attestation verification.",
  "docs_url": "https://docs.cowboy.inc/errors/E1619"
}
```

***

> [card] [All Error Codes](https://docs.cowboy.inc/errors/overview.md)
>
> View the complete error code reference


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