# Verify Link Record § †

<figure><img src="/files/YQdxbFdjZuUn7NNFjjIn" alt="" width="563"><figcaption></figcaption></figure>

1. Anyone with the original record and information can check whether the record exists at the location
2. Any type of link record (create, update and delete) can be verified
3. The result indicates whether there is a match, a mismatch, or unknown (retry later)

## **Verify Encoded Link**

To verify the original record, the verifier will need any previous link location, the record, encoder, salt and the expected location.

#### Example code:

{% tabs %}
{% tab title="cURL" %}

```bash
curl -X POST "$URL/api/v1/linkedrecords/$LOC/match?prevTxId=$LOC1&encode=SHA256(01-02T13.14.15)|Base64" \
     -H "x-api-key: $KEY" \
     -H "accept: text/plain" \
     -H "Content-Type: application/octet-stream" \
     --data-binary "hello"
```

{% endtab %}

{% tab title="JavaScript" %}

```javascript
const response = await fetch('${url}/api/v1/linkedrecords/${loc1}/match?prevTxId=${loc}&encode=SHA256(01-02T13.14.15)|Base64', {
  method: 'POST',
  headers: {
    'x-api-key': '${key}',
    'accept': 'text/plain',
    'Content-Type': 'application/octet-stream'
  },
  body: 'hello'
});
```

{% endtab %}
{% endtabs %}

## **Verify Unencoded Link** ‡

To verify the original record, the verifier will need any previous link location, the record and the expected location.

#### **Example** **code:**

{% tabs %}
{% tab title="cURL" %}

```bash
curl -X POST "$URL/api/v1/linkedrecords/$LOC/match?prevTxId=$LOC1" \
     -H "x-api-key: $KEY" \
     -H "accept: text/plain" \
     -H "Content-Type: application/octet-stream" \
     --data-binary "hello"
```

{% endtab %}

{% tab title="JavaScript" %}

```javascript
const response = await fetch('${url}/api/v1/linkedrecords/${loc1}/match?prevTxId=${loc}', {
  method: 'POST',
  headers: {
    'x-api-key': '${key}',
    'accept': 'text/plain',
    'Content-Type': 'application/octet-stream'
  },
  body: 'hello'
});
```

{% endtab %}
{% endtabs %}

## **Example Responses**

#### Example cURL matching response:

```json
{
  "match": true,
  ....
}
```

#### Example cURL mismatching response:

```json
{
  "match": false,
  ....
}
```

#### Example cURL unknown response:

```json
{
  "title": "Content not found",
  "status": 404,
  ....
}
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.teranode.group/nchain-event/linked-records/api-workflow/verify-link-record-+.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.