OT-2026-000001850
Publication integrity record
Apparatus and method for printing a contoured surface
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-2026-000001850) never changes.
Identity and time
| Publication number | OT-2026-000001850 · never reused |
|---|---|
| Internal UUID | 01a0a679-0043-7076-ae37-f90915535cc2 · UUIDv7, RFC 9562 |
| Publication timestamp | 2026-09-15T19:09:02.916037Z Recorded by the publication infrastructure in UTC, not taken from the submission. |
| Canonical URL | https://opentechnical.org/p/OT-2026-000001850 |
| Status | PUBLIC |
Content hashes
| Canonical text | 5b48ccac5dc2327fa5a8a0d2d5741bbeb053fc2167d9eacd78fabb21675d7b51 |
|---|---|
| Markdown | 90f1e18a803397d4cdb0d8f30ac110a9fb53cd870c868e0788428effec5b666b |
| Publication page | a43d3bc301b6c578bf87337317f3e489ff772a3d2c6e48149f0eb6b990f4a657 |
| Manifest | 8a315dcd07987c790cde2e6e8deda96471e889dc1d0079e4b1e16fbe6087ee52 |
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 | ARMG1ib642gqev7G8JUPjGEQfZH4+e3LNmWX7c+2ofK4F7kEcxQsBv4r3FuiKpbpOgDs5ZS7GA2JqJfTyoVoBw== |
| Public key | /integrity/keys · every key we have ever used stays published |
Trusted external timestamp
| timestamp.digicert.com | 2026-09-15T19:27:02Z batch OT-TS-2026-W38-002 · RFC 3161 token · inclusion proof root 2d7e364e718bd6a32072ec57f9edc195... |
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Independent retrieval
| 2026-09-16T04:41:52.911366Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000001850observed a43d3bc301b6c578bf87337317f3e489...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
|---|---|
| 2026-09-16T04:41:52.310864Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000001850/manifest.jsonobserved 8a315dcd07987c790cde2e6e8deda964...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-16T04:41:51.871951Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000001850/publication.mdobserved 90f1e18a803397d4cdb0d8f30ac110a9...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-16T04:41:51.384049Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000001850/publication.txtobserved 5b48ccac5dc2327fa5a8a0d2d5741bbe...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-15T19:10:18.871285Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000001850observed a43d3bc301b6c578bf87337317f3e489...fetched by instance-3.rotem.ai from 127.0.0.1, which resolved the name to 35.239.157.139 |
| 2026-09-15T19:10:18.839519Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000001850/manifest.jsonobserved 8a315dcd07987c790cde2e6e8deda964...fetched by instance-3.rotem.ai from 127.0.0.1, which resolved the name to 35.239.157.139 |
| 2026-09-15T19:10:18.826400Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000001850/publication.txtobserved 5b48ccac5dc2327fa5a8a0d2d5741bbe...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 |
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