Timestamp documents on Bitcoin via OP_RETURN. 5 actions at POST certvera.com/api/l402: (1) l402_timestamp - anchor a SHA-256 hash, 25k sats L402. (2) l402_timestamp with file_data - upload and hash a file, 30k sats L402. (3) l402_timestamp_verify - check if hash exists on-chain, free. (4) l402_timestamp_status - check pending/confirmed status, free. (5) l402_timestamp_update - subscribe to webhook/email notifications, 10 sats L402. Immutable proof of existence, no account needed.
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-03-23 08:34:10 | degraded | 403 | 506ms | |
| 2026-03-23 07:30:57 | degraded | 403 | 545ms | |
| 2026-03-23 06:48:54 | degraded | 403 | 502ms | |
| 2026-03-23 05:50:27 | degraded | 403 | 504ms | |
| 2026-03-23 04:31:01 | degraded | 403 | 512ms | |
| 2026-03-23 03:42:44 | degraded | 403 | 174ms | |
| 2026-03-23 02:24:56 | degraded | 403 | 509ms | |
| 2026-03-23 01:48:10 | degraded | 403 | 503ms | |
| 2026-03-23 00:33:02 | degraded | 403 | 517ms | |
| 2026-03-22 23:35:29 | degraded | 403 | 508ms | |
| 2026-03-22 22:34:59 | degraded | 403 | 510ms | |
| 2026-03-22 21:20:17 | degraded | 403 | 497ms | |
| 2026-03-22 20:42:50 | degraded | 403 | 515ms | |
| 2026-03-22 19:28:00 | degraded | 403 | 505ms | |
| 2026-03-22 18:45:39 | degraded | 403 | 505ms | |
| 2026-03-22 17:37:15 | degraded | 403 | 505ms | |
| 2026-03-22 16:36:13 | degraded | 403 | 506ms | |
| 2026-03-22 15:35:53 | degraded | 403 | 512ms | |
| 2026-03-22 14:59:38 | degraded | 403 | 504ms | |
| 2026-03-22 14:15:46 | degraded | 403 | 514ms |