Verify document integrity

Verifies the cryptographic integrity of all signatures on a document. Returns whether the document has been tampered with since it was signed.

GET/signatures/verify

Authorization

AuthorizationBearer token · headerrequired

Pass your API key as a Bearer token. API keys are scoped to specific operations — configure scopes in your organization's Settings → Developer → API Keys.

Query parameters

document_idstringrequired

Responses

200

Verification result

is_validbooleanrequired

True if all signatures are cryptographically valid

document_hashstringrequired

SHA-256 hash of the current document

verification_timestampstring<date-time>required

signaturesobject[]required

Show properties

Array of object

idstringrequired

recipient_emailstring<email>required

is_validbooleanrequired

signed_atstring<date-time>required

signature_hashstringrequired

401

Missing or invalid API key

typestringrequired

Machine-readable error code

statusintegerrequired

HTTP status code

titlestringrequired

Human-readable error message

detailsobject

Field-level validation errors

404

Resource not found

typestringrequired

Machine-readable error code

statusintegerrequired

HTTP status code

titlestringrequired

Human-readable error message

detailsobject

Field-level validation errors

Try it

Server

Base URLCustom base URLOverrides the selected server when set.

Authorization

Bearer tokenRemember on this deviceInclude my values in samples

Parameters

document_idquery*

Request

curl -X GET "https://api.seal.nyc/api/v1/signatures/verify?document_id=string" \
  -H "Authorization: Bearer YOUR_TOKEN"

const response = await fetch("https://api.seal.nyc/api/v1/signatures/verify?document_id=string", {
  method: "GET",
  headers: {
    "Authorization": "Bearer YOUR_TOKEN"
  }
});

import requests

response = requests.get(
    "https://api.seal.nyc/api/v1/signatures/verify?document_id=string",
    headers={
        "Authorization": "Bearer YOUR_TOKEN"
    },
)

Response

{
  "is_valid": true,
  "document_hash": "string",
  "verification_timestamp": "2019-08-24T14:15:22Z",
  "signatures": [
    {
      "id": "string",
      "recipient_email": "user@example.com",
      "is_valid": true,
      "signed_at": "2019-08-24T14:15:22Z",
      "signature_hash": "string"
    }
  ]
}

{
  "type": "AUTH_ERROR",
  "status": 401,
  "title": "Missing or invalid API key"
}

{
  "type": "NOT_FOUND",
  "status": 404,
  "title": "Document not found"
}