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.
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-03-21 03:15:08 | degraded | 301 | 504ms | |
| 2026-03-21 02:06:32 | degraded | 301 | 567ms | |
| 2026-03-21 01:30:51 | degraded | 301 | 589ms | |
| 2026-03-21 00:14:00 | degraded | 301 | 613ms | |
| 2026-03-20 23:26:24 | degraded | 301 | 577ms | |
| 2026-03-20 22:26:52 | degraded | 301 | 564ms | |
| 2026-03-20 21:35:51 | degraded | 301 | 500ms | |
| 2026-03-20 20:29:29 | degraded | 301 | 505ms | |
| 2026-03-20 19:36:53 | degraded | 301 | 591ms | |
| 2026-03-20 19:10:19 | degraded | 301 | 505ms | |
| 2026-03-20 18:01:40 | degraded | 301 | 1235ms | |
| 2026-03-20 17:17:02 | degraded | 301 | 166ms | |
| 2026-03-20 15:58:45 | degraded | 301 | 511ms | |
| 2026-03-20 15:23:49 | degraded | 301 | 511ms | |
| 2026-03-20 14:56:04 | degraded | 301 | 528ms | |
| 2026-03-20 13:54:19 | degraded | 301 | 705ms | |
| 2026-03-20 12:42:02 | degraded | 301 | 563ms | |
| 2026-03-20 11:55:12 | degraded | 301 | 575ms | |
| 2026-03-20 10:46:55 | degraded | 301 | 558ms | |
| 2026-03-20 09:54:36 | degraded | 301 | 513ms |