OpenTechnical

OT-2026-000003401

Publication integrity record

Ultrasonic log grading

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-2026-000003401) never changes.

Identity and time

Publication numberOT-2026-000003401 · never reused
Internal UUID01a0a6bc-361b-771c-ae3e-ae678b811fa2 · UUIDv7, RFC 9562
Publication timestamp2026-09-15T20:22:27.611866Z
Recorded by the publication infrastructure in UTC, not taken from the submission.
Canonical URLhttps://opentechnical.org/p/OT-2026-000003401
StatusPUBLIC

Content hashes

Canonical text57ef6a02ac8dabe355ea6f6b4df274c9d25559934784aa4ab31821914def943e
Markdown24bf78ff19454f0ee109e184a71974f3b4df58418fd286ed5acdba4bafd7b5fe
PDF
Publication page65c40117a8467e456fd5af2ece0a27b8ac3f8151fcf4bdeec164c68c9c9cb57f
Manifest326f27afb2431e83b35983923a81b3499af0bd4517bc26d7aab12cd71dbb5a8d

SHA-256, lowercase hex, over the exact bytes of each published file. Every figure is hashed individually in the manifest.

Manifest signature

AlgorithmEd25519 · key OT-SIGN-2026-01 · Verified
SignatureuvrgPGehmRGSbKETScJdjBZVSuso7EjEFy5JTZxBRm6IfXyGikwWkeub2mUToGZLLCpizVnY+SaISVKdrsYJDA==
Public key/integrity/keys · every key we have ever used stays published

Trusted external timestamp

timestamp.digicert.com2026-09-15T20:27:02Z
batch OT-TS-2026-W38-005 · RFC 3161 token · inclusion proof
root 0d980c01ea01b2d7f69845e24a85320c...

Independent retrieval

2026-09-16T04:23:17.287181ZHTTP 200 · MATCH
https://opentechnical.org/p/OT-2026-000003401
observed 65c40117a8467e456fd5af2ece0a27b8...
fetched by instance-3.rotem.ai from 34.69.0.72, which resolved the name to 35.239.157.139
2026-09-16T04:23:17.248013ZHTTP 200 · MATCH
https://opentechnical.org/p/OT-2026-000003401/manifest.json
observed 326f27afb2431e83b35983923a81b349...
fetched by instance-3.rotem.ai from 34.69.0.72, which resolved the name to 35.239.157.139
2026-09-16T04:23:17.234554ZHTTP 200 · MATCH
https://opentechnical.org/p/OT-2026-000003401/publication.md
observed 24bf78ff19454f0ee109e184a71974f3...
fetched by instance-3.rotem.ai from 34.69.0.72, which resolved the name to 35.239.157.139
2026-09-16T04:23:17.220630ZHTTP 200 · MATCH
https://opentechnical.org/p/OT-2026-000003401/publication.txt
observed 57ef6a02ac8dabe355ea6f6b4df274c9...
fetched by instance-3.rotem.ai from 34.69.0.72, which resolved the name to 35.239.157.139
2026-09-15T20:30:09.716863ZHTTP 200 · MATCH
https://opentechnical.org/p/OT-2026-000003401
observed 65c40117a8467e456fd5af2ece0a27b8...
fetched by instance-3.rotem.ai from 127.0.0.1, which resolved the name to 35.239.157.139
2026-09-15T20:30:09.686019ZHTTP 200 · MATCH
https://opentechnical.org/p/OT-2026-000003401/manifest.json
observed 326f27afb2431e83b35983923a81b349...
fetched by instance-3.rotem.ai from 127.0.0.1, which resolved the name to 35.239.157.139
2026-09-15T20:30:09.671903ZHTTP 200 · MATCH
https://opentechnical.org/p/OT-2026-000003401/publication.txt
observed 57ef6a02ac8dabe355ea6f6b4df274c9...
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 archivePending 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-W38OpenTechnical-Custody-2026-W38.tar.zst
f2fc69d02142424a578267e5e3a6d3bb... · 402,218,449 bytes · held by held on site pending an external custodian · retention permanent