OT-2026-000000049
Publication integrity record
Gearbox Predictive Maintenance Using Load-Normalized Envelope Spectra
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-2026-000000049) never changes.
Identity and time
| Publication number | OT-2026-000000049 · never reused |
|---|---|
| Internal UUID | 01a0a672-6aca-7997-b370-25cd6c29fb9a · UUIDv7, RFC 9562 |
| Publication timestamp | 2026-09-15T19:01:51.437148Z Recorded by the publication infrastructure in UTC, not taken from the submission. |
| Canonical URL | https://opentechnical.org/p/OT-2026-000000049 |
| Status | PUBLIC |
Content hashes
| Canonical text | b8d2bc45155780587408ea6de423def282c1871dfd45371db6eda6e52d69ac3d |
|---|---|
| Markdown | 022b6756e8eed32e048598cfa6af58abfba1675faa3babc97507383cbed73b4b |
| Publication page | d075729711eabf2baf6f8a7fbe3d2286793c14ca7655955fd427d9e376d39b4b |
| Manifest | 85b44793e5e37d8d7531549e990dec484471e24b6b66eb6bb27ffed100c685bf |
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 | N5K5xuvK9RMCmuAjizXY2//xfbgp10vacJMdv3t2cisOG81iREXa0rHzssFAwa0pjS8QQ+9mqvb/Gpw04WTYCg== |
| 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
| 2026-09-17T00:43:00.095966Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000049observed d075729711eabf2baf6f8a7fbe3d2286...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
|---|---|
| 2026-09-17T00:42:59.905209Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000049/manifest.jsonobserved 85b44793e5e37d8d7531549e990dec48...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-17T00:42:59.703692Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000049/publication.mdobserved 022b6756e8eed32e048598cfa6af58ab...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-17T00:42:59.377578Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000049/publication.txtobserved b8d2bc45155780587408ea6de423def2...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-16T00:43:11.336166Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000049observed d075729711eabf2baf6f8a7fbe3d2286...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-16T00:43:11.163230Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000049/manifest.jsonobserved 85b44793e5e37d8d7531549e990dec48...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-16T00:43:10.983602Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000049/publication.mdobserved 022b6756e8eed32e048598cfa6af58ab...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-16T00:43:10.739211Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000049/publication.txtobserved b8d2bc45155780587408ea6de423def2...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 |
|---|