OT-2026-000000691
Publication integrity record
Measurement method of surface shape and surface shape measurement device
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-2026-000000691) never changes.
Identity and time
| Publication number | OT-2026-000000691 · never reused |
|---|---|
| Internal UUID | 01a0a673-b422-7b1f-8bf3-4297b97066ef · UUIDv7, RFC 9562 |
| Publication timestamp | 2026-09-15T19:03:15.746518Z Recorded by the publication infrastructure in UTC, not taken from the submission. |
| Canonical URL | https://opentechnical.org/p/OT-2026-000000691 |
| Status | PUBLIC |
Content hashes
| Canonical text | 9cece208db36ff014ce50dc0363c58e2635886ba48046a487eda432135d4664d |
|---|---|
| Markdown | 308dd5d4d57140f72233f64063ead582ce3c88c02d7bad4f98254c2c4aba50cb |
| Publication page | 7fd1d20a682df66232dbe94b6f8d66f343fce74072cf14330c3cc4c0f3eef8ac |
| Manifest | 703efdee3ca78425ad81e472ec399ff04e3f2dd09180022f848688548d3ea9cf |
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 | uG7kSyN6E7BjQ+/Gcq/VwCrU3Ao175n+uPwDKkw8Z/gJ991KN9qZzgNBA/WWxAEFvktjfLZzt+q3Pm5F0ds3BA== |
| 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
| 2026-09-15T20:40:15.478742Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000691observed 7fd1d20a682df66232dbe94b6f8d66f3...fetched by instance-3.rotem.ai from 127.0.0.1, which resolved the name to 35.239.157.139 |
|---|---|
| 2026-09-15T20:40:15.323373Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000691/manifest.jsonobserved 703efdee3ca78425ad81e472ec399ff0...fetched by instance-3.rotem.ai from 127.0.0.1, which resolved the name to 35.239.157.139 |
| 2026-09-15T20:40:15.311879Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000691/publication.txtobserved 9cece208db36ff014ce50dc0363c58e2...fetched by instance-3.rotem.ai from 127.0.0.1, 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 |
|---|