Signature Date: 2026-10-25
First Archived: 2026-10-25
Last Updated: 2026-10-26
**The First Archived date is based on the article's creation date. All subsequent revisions are reflected in the Last Updated date.*

Signature Milestone — First Build of Signature Milestone

YURI NO1 decided to document major commemorative milestones as precisely as possible, archiving them under the concept of a "signature."

The signature timestamp is taken from the opening message of the discussion thread with an AI agent concerning the establishment of the milestone archive.

The first milestone formally archived under this system was First Animated Image.

Contributing OC:

⛢Icy

**Her role in First Animated Image was also key to recognizing the historical significance of preserving milestones as signature records.*

Associated AI Technology:

ChatGPT-6 Sol

**If the version listed for the milestone date differs from the service provider's official announcements, the provider's announcements shall take precedence. This disclaimer acknowledges the possibility of errors in YURI NO1's verification of version numbers.*

Timestamp Verification Method:

ChatGPT Web — Google Chrome DevTools (Network Panel)

Evidence Metadata:

{
"messages": [
{
"author": {
"role": "user"
},
"create_time": 179292----.---,
"content": {
"content_type": "text"
}
}
]
}

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**Converted Date (UTC): 2026-10-25T12:01:--.---Z*
**Converted Date (UTC+8): 2026-10-25 20:01:--.---*