OT-2026-000003221
Publication integrity record
Safety device for detecting improper positioning of a ladder
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-2026-000003221) never changes.
Identity and time
| Publication number | OT-2026-000003221 · never reused |
|---|---|
| Internal UUID | 01a0a69f-f3b5-7109-8365-276fb586e036 · UUIDv7, RFC 9562 |
| Publication timestamp | 2026-09-15T19:51:35.605467Z Recorded by the publication infrastructure in UTC, not taken from the submission. |
| Canonical URL | https://opentechnical.org/p/OT-2026-000003221 |
| Status | PUBLIC |
Content hashes
| Canonical text | d71b7d26b6f8342830184234c394e4b262761d9b326ad3a73567e8a4ccf03843 |
|---|---|
| Markdown | df306f9e71e641b86671b9afb6f3f15288dd916982bdc7fb70e2df37ccc7d5e5 |
| Publication page | 31b0d79a73ef976c7bf045a8e36220ab15d1708963b79b648f89400b13463149 |
| Manifest | 2d0633f8f35ac4a3c33195a941e0592f9ae5cd67cecdd510e02be403baac9345 |
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 | S+5p6RszkgZTDIlI2rGtDAz+BmFVjRFGp8+I+CdBTK5ylYoHWptSjN/S/0siK2mSsKYjQCnIfFqMOyLAsAO2BQ== |
| Public key | /integrity/keys · every key we have ever used stays published |
Trusted external timestamp
| timestamp.digicert.com | 2026-09-15T20:07:03Z batch OT-TS-2026-W38-004 · RFC 3161 token · inclusion proof root d42f3e627490c26ffd144bf37543fecf... |
|---|
Independent retrieval
| 2026-10-21T04:41:02.913835Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003221observed 31b0d79a73ef976c7bf045a8e36220ab...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
|---|---|
| 2026-10-21T04:41:02.864331Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003221/manifest.jsonobserved 2d0633f8f35ac4a3c33195a941e0592f...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-21T04:41:02.796090Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003221/publication.mdobserved df306f9e71e641b86671b9afb6f3f152...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-21T04:41:02.628601Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003221/publication.txtobserved d71b7d26b6f8342830184234c394e4b2...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-07T00:41:30.253726Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003221observed 31b0d79a73ef976c7bf045a8e36220ab...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-07T00:41:30.090571Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003221/manifest.jsonobserved 2d0633f8f35ac4a3c33195a941e0592f...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-07T00:41:29.943267Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003221/publication.mdobserved df306f9e71e641b86671b9afb6f3f152...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-07T00:41:29.731497Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000003221/publication.txtobserved d71b7d26b6f8342830184234c394e4b2...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 |
|---|