OT-2026-000002031
Publication integrity record
Tower crane step-changing device and tower crane
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-2026-000002031) never changes.
Identity and time
| Publication number | OT-2026-000002031 · never reused |
|---|---|
| Internal UUID | 01a0a67a-2b01-769b-91d7-582917d71c14 · UUIDv7, RFC 9562 |
| Publication timestamp | 2026-09-15T19:10:19.393999Z Recorded by the publication infrastructure in UTC, not taken from the submission. |
| Canonical URL | https://opentechnical.org/p/OT-2026-000002031 |
| Status | PUBLIC |
Content hashes
| Canonical text | fdc3357d45b5bde4c5e205f1009180d81ee70e3df4559468b482daf6b79bb7ae |
|---|---|
| Markdown | a14a30e925a7063aa82d06c0b655e4d2608f992652e2b93edad6a08a5f4e64b3 |
| Publication page | 2d11414c09658fe41f91ba130a5725587dc45cf4628e7da0e316d6dc36068088 |
| Manifest | bf12068bc67e5f503cdbdf316136fe554781c889370309c539a4b1537fc83ea2 |
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 | 42Np88y64R2X/9iu8VrFxGnRiflTHtlOfaLjfDQ8dv5kRKidiKMRNRWOnxFuw1UhndhKJejvJSbPY6rOkrD+Dw== |
| 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... |
|---|
Independent retrieval
| 2026-09-15T19:50:33.093108Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000002031observed 2d11414c09658fe41f91ba130a572558...fetched by instance-3.rotem.ai from 127.0.0.1, which resolved the name to 35.239.157.139 |
|---|---|
| 2026-09-15T19:50:33.066059Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000002031/manifest.jsonobserved bf12068bc67e5f503cdbdf316136fe55...fetched by instance-3.rotem.ai from 127.0.0.1, which resolved the name to 35.239.157.139 |
| 2026-09-15T19:50:32.927751Z | HTTP 200 · MATCHhttps://opentechnical.org/p/OT-2026-000002031/publication.txtobserved fdc3357d45b5bde4c5e205f1009180d8...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 |
|---|