---
title: "Inspect external timestamp evidence"
method: GET
path: "/api/v1/chain/anchors"
tags: ["Integrity"]
---

# Inspect external timestamp evidence

`GET /api/v1/chain/anchors`

## Request

- Base URL: `https://fonteum.com`
- URL: `https://fonteum.com/api/v1/chain/anchors`
- Auth: none required

Public, no-store endpoint for append-only timestamp attempts. Legacy proofs are quarantined. A result reaches mainnet_verified only with a retained proof path and Bitcoin Core active-chain header evidence. active is true only when a pending or mainnet_verified attempt targets the exact current chain head and the chain has advanced within six hours; pending denotes operational activity, not Bitcoin confirmation.

## Response `200`

Timestamp-attempt status, evidence counts, and current chain liveness.

- ChainAnchorsResponse
  - `active` boolean, required: True only when the chain is fresh and a pending or mainnet_verified attempt targets the exact current head.
  - `table_present` boolean, required
  - `attempts_table_present` boolean, required
  - `counts` object, required
    - `total` integer, required
    - `quarantined` integer, required
    - `pending` integer, required
    - `mainnet_verified` integer, required
  - `chain` object, required
    - `fresh` boolean, required
    - `last_extended_at` string, date-time, nullable, required
    - `age_seconds` number, nullable, required
    - `stale_after_seconds` integer, required
  - `chain_head_anchor` ChainAnchorSummary, required
    - `anchor_type` 'daily_merkle_root' | 'attestation_hash' | 'chain_head' | 'digest', required
    - `target_ref` string, nullable, required
    - `digest_hex` string, required
    - `digest_short` string, required
    - `calendar_url` string, uri, required
    - `status` 'quarantined' | 'pending' | 'mainnet_verified', required
    - `state` 'quarantined' | 'pending' | 'mainnet_verified', required
    - `proof_generation` integer, nullable, required
    - `bitcoin_block_height` integer, nullable, required
    - `provider` string, nullable, required
    - `block_id` string, nullable, required
    - `submitted_at` string, date-time, required
    - `verified_at` string, date-time, nullable, required
    - `quarantine_reason` string, nullable, required
  - `latest_mainnet_verified` ChainAnchorSummary, required
    - `anchor_type` 'daily_merkle_root' | 'attestation_hash' | 'chain_head' | 'digest', required
    - `target_ref` string, nullable, required
    - `digest_hex` string, required
    - `digest_short` string, required
    - `calendar_url` string, uri, required
    - `status` 'quarantined' | 'pending' | 'mainnet_verified', required
    - `state` 'quarantined' | 'pending' | 'mainnet_verified', required
    - `proof_generation` integer, nullable, required
    - `bitcoin_block_height` integer, nullable, required
    - `provider` string, nullable, required
    - `block_id` string, nullable, required
    - `submitted_at` string, date-time, required
    - `verified_at` string, date-time, nullable, required
    - `quarantine_reason` string, nullable, required
  - `latest_submission_at` string, date-time, nullable, required
  - `note` string, required
  - `evidence_policy` string, required
  - `chain_url` string, uri, required
  - `status_url` string, uri, required
  - `docs_url` string, uri, required

---

[API](https://skmtc.dev/fonteum/apis/fonteum-api.md) · [All operations](https://skmtc.dev/fonteum/apis/fonteum-api/llms.txt) · [OpenAPI document](https://skmtc.dev/fonteum/apis/fonteum-api/revisions/334e6e179d0d?raw)