OT-2026-000000390
Publication integrity record
Method and device for spot welding
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-2026-000000390) never changes.
Identity and time
| Publication number | OT-2026-000000390 · never reused |
|---|---|
| Internal UUID | 01a0a673-4e2e-7544-a65f-7ba7257adce4 · UUIDv7, RFC 9562 |
| Publication timestamp | 2026-09-15T19:02:49.647356Z Recorded by the publication infrastructure in UTC, not taken from the submission. |
| Canonical URL | https://opentechnical.org/p/OT-2026-000000390 |
| Status | PUBLIC |
Content hashes
| Canonical text | e9a4f41ad46749b9dc9dc5b3a8a01ff2831eee6d280b6c961bd5641b0eb5045f |
|---|---|
| Markdown | 628a85a081857c735e219d59d909ff85bb09f69db3d589b81a42613d746d86c3 |
| Publication page | 51834b793f3712060a3473364216e996e7be4f5b2584e912e672046388c51726 |
| Manifest | d3016a990ae36e86af4f6d76b7297919601c0803e312d6aad2aeeeaec814d739 |
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 | Qo8BwJHOc7mMVdiENwf24aZDfaROzr0HWxoN1qLLCklqvtPJqt6mWKByEYbG1bdurPCA3jfpLHDkUG1W4Z2GCg== |
| 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
| 2026-10-11T20:41:39.505177Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000390observed 51834b793f3712060a3473364216e996...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
|---|---|
| 2026-10-11T20:41:39.398975Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000390/manifest.jsonobserved d3016a990ae36e86af4f6d76b7297919...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-11T20:41:39.300451Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000390/publication.mdobserved 628a85a081857c735e219d59d909ff85...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-10-11T20:41:39.053443Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000390/publication.txtobserved e9a4f41ad46749b9dc9dc5b3a8a01ff2...fetched by grabo-systems from 34.44.131.203, which resolved the name to 35.239.157.139 |
| 2026-09-15T20:50:15.358423Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000390observed 51834b793f3712060a3473364216e996...fetched by instance-3.rotem.ai from 127.0.0.1, which resolved the name to 35.239.157.139 |
| 2026-09-15T20:50:15.325773Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000390/manifest.jsonobserved d3016a990ae36e86af4f6d76b7297919...fetched by instance-3.rotem.ai from 127.0.0.1, which resolved the name to 35.239.157.139 |
| 2026-09-15T20:50:15.308897Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000000390/publication.txtobserved e9a4f41ad46749b9dc9dc5b3a8a01ff2...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 |
|---|