OT-2026-000003470
Publication integrity record
Self-contained laser-activated depth sensor for excavator
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-2026-000003470) never changes.
Identity and time
| Publication number | OT-2026-000003470 · never reused |
|---|---|
| Internal UUID | 01a0a6c4-a87f-7698-b727-f53c64b41572 · UUIDv7, RFC 9562 |
| Publication timestamp | 2026-09-15T20:31:41.184152Z Recorded by the publication infrastructure in UTC, not taken from the submission. |
| Canonical URL | https://opentechnical.org/p/OT-2026-000003470 |
| Status | PUBLIC |
Content hashes
| Canonical text | 87b61a58d1e1d91783bd7a698d27dd5599205655e4f460d54dc9ac6dc3e435cb |
|---|---|
| Markdown | 3eee88dc2fde47eff5f93a560a711fa928eb4cf51a4da5561e8de2185682f4dd |
| Publication page | e545cbecc9cf180b8929654c009ca35138a1fc43ec7f639d56837119a692a6a3 |
| Manifest | ff7605b4d935ebf49f20aa1d0c0b58f444033dfffb404f5a4c0cb0fed99c1c68 |
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 | 8Cpcme+P38+9hUEcY0laNu6FSd9MzN3vQK9mW8xXJOKJIi8vdOa3gWWeM57DeHdBA7T6kpiQ4yR7bLK/e5BYDA== |
| Public key | /integrity/keys · every key we have ever used stays published |
Trusted external timestamp
| timestamp.digicert.com | 2026-09-15T20:36:25Z batch OT-TS-2026-W38-006 · RFC 3161 token · inclusion proof root 40fdb380c9f41bd58bb35c455dde2c7d... |
|---|
Independent retrieval
| 2026-10-16T12:41:36.468469Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003470observed e545cbecc9cf180b8929654c009ca351...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
|---|---|
| 2026-10-16T12:41:36.417947Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003470/manifest.jsonobserved ff7605b4d935ebf49f20aa1d0c0b58f4...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-16T12:41:36.369338Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003470/publication.mdobserved 3eee88dc2fde47eff5f93a560a711fa9...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-16T12:41:36.251237Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003470/publication.txtobserved 87b61a58d1e1d91783bd7a698d27dd55...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-16T00:41:49.435261Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003470observed e545cbecc9cf180b8929654c009ca351...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-16T00:41:48.958432Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003470/manifest.jsonobserved ff7605b4d935ebf49f20aa1d0c0b58f4...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-16T00:41:48.609126Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003470/publication.mdobserved 3eee88dc2fde47eff5f93a560a711fa9...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-16T00:41:48.313908Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003470/publication.txtobserved 87b61a58d1e1d91783bd7a698d27dd55...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 |
|---|