Submit Hashes

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Submit Hashes for Timestamping

Send one or more SHA256 hashes to be timestamped on the Bitcoin blockchain. This endpoint supports up to 1,000 hashes per request.

Endpoint: POST /api/proof/timestamp/hashes
Description: Use this endpoint to timestamp an array of hashes on the Bitcoin blockchain. The hashes must be in hexadecimal format and 64 characters long.

Headers

x-access-token (string, required): Your API token.

Request Body

Content-Type: application/json

Schema:

{
	"callback_url": "https://example.com/callback",
	"hashes": [
    "ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb",
    "1a8c3743df10869051e093753221651d69e9f556345492398daf0a944f4fe4a4",
    "149d5f7d5d3622f0495ab57f0646405946bf47f14831a7c9b1a69c41948de000"
  ]
}

hashes (array of strings, required): An array of up to 1,000 SHA256 hexadecimal hashes.
callback_url (string, optional): Valid URL to receive a POST request with the result in JSON format.

Response

200 OK

The hashes were successfully submitted for timestamping.

{
  "ok": true,
  "files": [
    "ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb",
    "1a8c3743df10869051e093753221651d69e9f556345492398daf0a944f4fe4a4",
    "149d5f7d5d3622f0495ab57f0646405946bf47f14831a7c9b1a69c41948de000"
  ]
}

400 Bad Request

The request was invalid or violated the endpoint's constraints (e.g., exceeding the hash limit).
```
{
  "ok": false,
  "msg": "A maximum of 1000 hashes per request is allowed."
}
```
500 Internal Server Error

The server encountered an unexpected issue while processing the request.
```
{
  "ok": false,
  "msg": "Internal server error. Please try again later."
}
```

Example Request (Using `curl`)

curl -X POST https://app.simpleproof.com/api/proof/timestamp/hashes \
-H "Content-Type: application/json" \
-H "x-access-token: YOUR_TOKEN" \
-d '{
	"callback_url": "https://example.com/callback",
	"hashes": [
    "ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb",
    "1a8c3743df10869051e093753221651d69e9f556345492398daf0a944f4fe4a4",
    "149d5f7d5d3622f0495ab57f0646405946bf47f14831a7c9b1a69c41948de000"
  ]
}'

Notes

Each hash MUST TO BE exactly 64 characters long and in SHA256 hexadecimal hashes format.
If you need to timestamp more than 1,000 hashes, divide them into multiple requests.
Timestamps are recorded on the Bitcoin blockchain, ensuring immutable verification.