Verification & scans

Overview

Ananke TCode verification checks the authenticity and status of a stamped document. It works through three inputs: the document reference, its content hash, or the raw barcode payload from a scan. All methods return the same structured result with a verdict and document status.

Verification methods

Verify by reference

const result = await client.tcode.verify.byReference("TCR-ABCD1234");

console.log(result.verdict);     // "valid"
console.log(result.status);      // "Active"
console.log(result.issuerName);  // "Acme Corp"

Verify by hash

const result = await client.tcode.verify.byHash(
  "e3b0c44298fc1c149afbf4c8996fb924..."
);

console.log(result.verdict);  // "valid" | "revoked" | "not_found"

Verify by payload (scan)

When a user scans the DataMatrix barcode, the scanner decodes the binary payload. Send it to the verification endpoint:

const result = await client.tcode.verify.byPayload({
  payload: scannedPayloadBase64,
});

console.log(result.verdict);  // "valid"

curl -X POST https://api.anankelabs.net/v1/tcode/verify \
  -H "Content-Type: application/json" \
  -d '{ "payload": "<base64-encoded barcode payload>" }'

Sync verification

Sync verification is used when the scanner provides additional context (location, device info) that should be recorded alongside the verification result:

POST /v1/tcode/verify/sync
{
  "payload": "<base64-encoded payload>",
  "context": {
    "scannerId": "device-001",
    "location": "Checkpoint A"
  }
}

Verification outcomes

Scan history

Retrieve the verification / scan history for a specific document:

const scans = await client.tcode.verify.documentScans("TCR-ABCD1234", {
  page: 1,
  pageSize: 25,
});

for (const scan of scans.items) {
  console.log(scan.verdict, scan.verifiedAt);
}

Digital twin

Retrieve the digital twin — the full document record associated with an Ananke TCode stamp:

GET /v1/tcode/verify/digital-twin/{reference}

This returns the stamp metadata, verification status, and document details without requiring any authentication. Useful for building public verification landing pages.

Public key retrieval

For advanced integrators building offline verification, retrieve the signing public key:

GET /v1/tcode/verify/public-key

Edge cases

• Corrupted barcode — If the payload cannot be decoded, the endpoint returns 400 with a descriptive error.
• Expired documents — Ananke TCode stamps do not expire by default. Lifecycle is managed via explicit suspend/revoke actions.
• Replaced documents — Verifying the old reference returns revoked with a pointer to the replacement.
• Offline verification — The barcode payload includes a signature that can be verified against the public key without an internet connection. The online check is needed to confirm the current lifecycle state.

Next steps

• Guide: Build a verification page — Frontend UI patterns.
• Ananke TCode API Reference — Full endpoint documentation.
• TypeScript SDK: Ananke TCode — SDK method reference.