Overview
Verify a SHA-256 document hash on the Bitcoin blockchain. Returns OP_RETURN proof with block height, tx ID, and merkle path. POST {action: l402_timestamp_verify, hash: <sha256hex>} to certvera.com/api/l402. Free, rate-limited to 10 req/min. No account needed.
Protocol
L402
Price
—
Payment Asset
BTC
Payment Network
Lightning
Category
identity
Provider
Paul
Source
satring
Indexed
2026-03-17 18:59:38
Health
Status
degraded
Latency (p50)
489ms
Uptime (30d)
96.2%
Reliability Score
78.1/100
Last Checked
2026-05-07 06:45:53
Last Healthy
Never
Consecutive Failures
17
Macaroon Format
Format
Not yet detected
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-05-07 06:45:53 | degraded | 403 | 489ms | |
| 2026-05-07 00:49:21 | degraded | 403 | 489ms | |
| 2026-05-06 22:51:13 | degraded | 403 | 495ms | |
| 2026-05-06 17:40:08 | degraded | 403 | 484ms | |
| 2026-05-06 17:00:57 | degraded | 403 | 492ms | |
| 2026-05-06 14:06:50 | degraded | 403 | 494ms | |
| 2026-05-06 11:58:53 | degraded | 403 | 490ms | |
| 2026-05-06 09:20:05 | degraded | 403 | 488ms | |
| 2026-05-06 05:55:34 | degraded | 403 | 967ms | |
| 2026-05-06 03:55:56 | degraded | 403 | 840ms | |
| 2026-05-05 23:23:54 | degraded | 403 | 488ms | |
| 2026-05-05 20:06:14 | degraded | 403 | 481ms | |
| 2026-05-05 17:04:28 | degraded | 403 | 494ms | |
| 2026-05-05 13:59:52 | degraded | 403 | 489ms | |
| 2026-05-05 11:24:30 | degraded | 403 | 483ms | |
| 2026-05-05 08:40:04 | degraded | 403 | 484ms | |
| 2026-05-05 05:20:16 | degraded | 403 | 486ms | |
| 2026-05-05 01:53:09 | timeout | — | — | timeout |
| 2026-05-04 22:49:14 | degraded | 403 | 826ms | |
| 2026-05-04 20:39:36 | degraded | 403 | 480ms |