---
title: "ETR Singularity & Exclusive-Control Evidence Checker"
method: POST
path: "/v1/tools/check_etr_control_evidence"
tags: ["TODO_TAGS_REVIEW", "TODO_AP2_EXPORT_REVIEW"]
---

# ETR Singularity & Exclusive-Control Evidence Checker

`POST /v1/tools/check_etr_control_evidence`

## Request

- Base URL: `https://ainumbers.co`
- URL: `https://ainumbers.co/v1/tools/check_etr_control_evidence`
- Auth: none declared

Checks a supplied electronic transferable record (ETR/eBL) document digest and control-assertion set (platform identity, singularity assertion, control-transfer events with timestamps and signatures as supplied) against MLETR Art. 10/11 functional-equivalence elements: integrity ref, singularity assertion present, control chain continuous, no overlapping-control intervals. Walks the supplied event log as a single chain of custody and flags any event that does not extend it as an overlapping/unknown-party control claim -- pure interval/chain math over the evidence as presented, not a legal opinion or registry attestation of which copy is authoritative. For general eBL/MLETR functional-equivalence self-assessment scoring use validate_mletr_record (art-53); this tool verifies a concrete supplied control-transfer event log for singularity/exclusivity specifically.

**Tool URL:** https://ainumbers.co/chaingraph/art-352-etr-control-evidence-checker.html

## Request body

- object
  - `control_events` unknown
  - `document_digest` string: type not evidenced by kernel source
  - `original_holder` string: type not evidenced by kernel source
  - `platform_identity` string: type not evidenced by kernel source
  - `singularity_assertion` boolean: type not evidenced by kernel source

## Response `200`

Successful tool execution result

- object
  - `chain_summary` object
    - `final_holder` string
    - `final_interval_open` boolean
    - `holder_intervals` object[]
      - `end_epoch_ms` integer
      - `holder` string
      - `start_epoch_ms` string
    - `malformed_event_count` integer
    - `overlap_event_count` integer
    - `total_events` integer
    - `valid_chain_events` integer
  - `document_digest` string
  - `element_checklist` object
    - `chain_continuity` object
      - `article` string
      - `detail` string
      - `result` string
    - `exclusive_control` object
      - `article` string
      - `detail` string
      - `overlap_events` unknown[]
        - unknown
      - `result` string
    - `integrity_ref` object
      - `article` string
      - `detail` string
      - `result` string
    - `singularity` object
      - `article` string
      - `detail` string
      - `result` string
  - `malformed_events` unknown[]
    - unknown
  - `note` string
  - `overall_verdict` string
  - `platform_identity` string

---

[API](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite.md) · [All operations](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/llms.txt) · [OpenAPI document](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/revisions/b462e4f5bb28?raw)