Brazil ICP-Brasil

ICP-Brasil (Infraestrutura de Chaves Públicas Brasileira) is Brazil’s national public key infrastructure, established by MP 2.200-2/2001. An ICP-Brasil trusted timestamp (carimbo do tempo) proves that a document existed, unaltered, at a specific point in time.

When attestation is set to br_icp_brasil, SignatureAPI obtains an RFC 3161 timestamp from an ICP-Brasil accredited timestamp authority and embeds it in the deliverable as a PDF document timestamp. There is no extra page and no separate attachment: the timestamp is part of the deliverable itself.

The timestamp is verifiable in standard PDF readers, such as Adobe Acrobat, under the document’s signature panel. It includes long-term validation (LTV) data, so it remains verifiable even after the timestamp authority’s certificates expire.

To use ICP-Brasil, set attestation to br_icp_brasil when creating the envelope:

// POST https://api.signatureapi.com/v1/envelopes
// X-API-Key: key_test_...
// Content-Type: application/json

{
    "title": "Contrato",
    "attestation": "br_icp_brasil",
    "documents": [
        //...
    ],
    "recipients": [
        //...
    ]
}