Check one approval

GET /v1/approval/{number}

https://verify.tanba-ooh.kz/v1/approval/{number}

The same answer for an unknown number, a malformed number, a submission number and a rejected submission. Send Accept of application/json for JSON, anything else gets the HTML page.

Authentication

None. This call is public.

Parameters

Name	In	Type	Required	Description	Example
`number`	path	string	yes	Approval number.	`TNB-2026-000123`
`p`	query	string	no	Presence token printed in the QR code of a player that holds the key. A valid token adds one count to the presence of that player; the answer is the same with, without or with a wrong token.	`m2oTq0cFk1gAAl3x-9Q`

Responses

200 The approval and its signed manifest.

`application/json`

PublicApproval

Name	Type	Required	Description	Example
`approval`	object	yes	The approval.
`approval.number`	string	yes	Approval number.	`"TNB-2026-000123"`
`approval.status`	string	yes	State of the approval.	`"active"`
`approval.ledger`	array of object		Where the approval and its revocation are recorded in the public ledger; empty until the day is closed.
`approval.ledger[].kind`	string	yes	Whether the entry records the issue or the revocation. issued, revoked
`approval.ledger[].day`	string (date)	yes	Day of the ledger entry, Asia/Almaty.	`"2026-10-06"`
`approval.ledger[].status`	string	yes	How far the day has been anchored in Bitcoin. pending, pending_check, anchored
`approval.ledger[].block_height`	integer		Number of the Bitcoin block that holds the attestation; present once the day is anchored.	`905432`
`approval.ledger[].proof_url`	string	yes	Address of the inclusion proof for this entry.	`"/v1/approval/TNB-2026-000123/ledger-proof"`
`manifest`	object	yes	The signed manifest with the advertiser's number masked.
`manifest_masked`	boolean		Always true: the advertiser's number in `manifest` is masked, so it is not the signed bytes.	`true`
`manifest_sha256`	string		Hex SHA-256 of the original signed manifest bytes, before masking.	`"878a9b0a8452700baaab5574e39716d67a93a07597baab30823639c69bf1e889"`

Example

{
  "approval": {
    "number": "TNB-2026-000123",
    "status": "active",
    "ledger": [
      {
        "kind": "issued",
        "day": "2026-10-06",
        "status": "pending",
        "block_height": 905432,
        "proof_url": "/v1/approval/TNB-2026-000123/ledger-proof"
      }
    ]
  },
  "manifest": {},
  "manifest_masked": true,
  "manifest_sha256": "878a9b0a8452700baaab5574e39716d67a93a07597baab30823639c69bf1e889"
}

`text/html`

304 Not modified (ETag).

No body.

Errors

Errors are problem documents (application/problem+json) with a stable code.

Status	Meaning
404	Not an issued approval.
429	Rate limit; see `Retry-After`.

Code samples

curl

curl 'https://verify.tanba-ooh.kz/v1/approval/TNB-2026-000123' \
  -H 'Accept: application/json'

Python

import requests

response = requests.get(
    "https://verify.tanba-ooh.kz/v1/approval/TNB-2026-000123",
    headers={
        "Accept": "application/json",
    },
)
print(response.status_code, response.text)

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	req, err := http.NewRequest("GET", "https://verify.tanba-ooh.kz/v1/approval/TNB-2026-000123", nil)
	if err != nil {
		panic(err)
	}
	req.Header.Set("Accept", "application/json")
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()
	data, _ := io.ReadAll(resp.Body)
	fmt.Println(resp.Status, string(data))
}