OT-2026-000000528
Publication integrity record
Robust predictive maintenance method for multiple machineries using multiple microphones
This page is the evidence record. It changes as evidence arrives: a trusted timestamp, an independent retrieval, a custody deposit. The disclosure itself (/p/OT-2026-000000528) never changes.
Identity and time
| Publication number | OT-2026-000000528 · never reused |
|---|---|
| Internal UUID | 01a0a673-7f9a-7aac-ba88-69b883b9e004 · UUIDv7, RFC 9562 |
| Publication timestamp | 2026-09-15T19:03:02.299006Z Recorded by the publication infrastructure in UTC, not taken from the submission. |
| Canonical URL | https://opentechnical.org/p/OT-2026-000000528 |
| Status | PUBLIC |
Content hashes
| Canonical text | 9b924dd0ed48357b69cff6f9bfb737430d510f61a4a85a69139d35bfe38216ee |
|---|---|
| Markdown | c914f72dd7917d38c39bd55541aac554d005c80023302ff4d9ee725772b298e3 |
| Publication page | fa08f06cd808ac894d911047fd1aa1a6b87a41bfc0b357690686035b368018ba |
| Manifest | 63adf700a7b768e8511fe294cd6c71092c7cb1db83f19a3003885351e772d933 |
SHA-256, lowercase hex, over the exact bytes of each published file. Every figure is hashed individually in the manifest.
Manifest signature
| Algorithm | Ed25519 · key
OT-SIGN-2026-01 · Verified |
|---|---|
| Signature | afOIr32ZxsDrSxlKOTO922hh7RFt5yTSCxe8gZz22J7O83EGltiTONfouyyuI+lPCB1RTM22fPC2i221zhZLAg== |
| Public key | /integrity/keys · every key we have ever used stays published |
Trusted external timestamp
| timestamp.digicert.com | 2026-09-15T19:07:03Z batch OT-TS-2026-W38-001 · RFC 3161 token · inclusion proof root 6369baadb1a246009d149835804d20ba... |
|---|
Independent retrieval
| 2026-10-21T12:41:16.532830Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000528observed fa08f06cd808ac894d911047fd1aa1a6...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
|---|---|
| 2026-10-21T12:41:16.480227Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000528/manifest.jsonobserved 63adf700a7b768e8511fe294cd6c7109...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-21T12:41:16.433900Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000528/publication.mdobserved c914f72dd7917d38c39bd55541aac554...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-21T12:41:16.178844Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000528/publication.txtobserved 9b924dd0ed48357b69cff6f9bfb73743...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-30T08:41:12.737544Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000528observed fa08f06cd808ac894d911047fd1aa1a6...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-30T08:41:12.686917Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000528/manifest.jsonobserved 63adf700a7b768e8511fe294cd6c7109...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-30T08:41:12.611068Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000528/publication.mdobserved c914f72dd7917d38c39bd55541aac554...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-30T08:41:12.429041Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000528/publication.txtobserved 9b924dd0ed48357b69cff6f9bfb73743...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
Requested from infrastructure separate from the publication system, over the public internet, with no credential. A MATCH means an ordinary internet client could fetch the publication and received exactly the bytes recorded above.
Independent archive
| External archive | Pending Canonical URLs are submitted to an independent archive in batches. |
|---|
A capture held by an outside archive is evidence that does not depend on OpenTechnical continuing to exist. It supplements the records above; it does not replace them.
Third-party custody
| OT-CUSTODY-2026-W38 | OpenTechnical-Custody-2026-W38.tar.zstf2fc69d02142424a578267e5e3a6d3bb... · 402,218,449 bytes · held by held on site pending an external custodian · retention permanent |
|---|