ad-contents.jp: what it tells AI crawlers

On 27 October 2026, ad-contents.jp's robots.txt allowed all of GPTBot, OAI-SearchBot, ClaudeBot, Claude-SearchBot, Google-Extended, PerplexityBot and CCBot.

Last verified 2026-10-28 03:59 UTC (daily run of 2026-10-27). Proof for that day.

Panel
top 10k (Tranco)
robots.txt
ok (HTTP 200) · https://ad-contents.jp/robots.txt
unchanged since 2026-10-26 · sha256 5d9a0d12a6291055… · view as recorded

Per AI bot, 2026-10-27

User agentVerdictHow
GPTBotallowsno applicable rules
OAI-SearchBotallowsno applicable rules
ChatGPT-Userallowsno applicable rules
ClaudeBotallowsno applicable rules
Claude-SearchBotallowsno applicable rules
Claude-Userallowsno applicable rules
PerplexityBotallowsno applicable rules
Perplexity-Userallowsno applicable rules
Googlebotblocksnamed in its own group
Google-Extendedallowsno applicable rules
Applebot-Extendedallowsno applicable rules
CCBotallowsno applicable rules
Bytespiderallowsno applicable rules
Meta-ExternalAgentallowsno applicable rules
Amazonbotallowsno applicable rules

Other signals

Publishes /llms.txtno
Publishes /ai.txtno
Publishes /.well-known/tdmrep.jsonno
Reserves TDM rights (TDMRep file, header or meta)no
Declares Content Signals (robots.txt or header)no
Says ai-train=no in a Content Signalno
Points to an RSL licence (robots.txt License line or Link header)no
Answers with an x402 payment offer (lower bound: only the homepage is probed)no
Answers HTTP 402 Payment Required (lower bound: only the homepage is probed)no
Sends noai / noimageai directivesno
Refused our fetcher (403 / challenge)no

robots.txt as recorded sha256 532fe30be4e9c252…

User-agent: archive.org_bot
Disallow: /

User-agent: MJ12bot
Disallow: /

User-agent: Googlebot
Disallow: /

User-agent: bingbot
Disallow: /

robots.txt versions

FromThroughStateVersion
2026-10-262026-10-27ok 2005d9a0d12a629

Timeline of changes

DateWhat changed
No changes since the first observation (2026-10-26).

Reconstructed history (Common Crawl)

From Common Crawl's robots.txt captures: what CCBot was served, one crawl per quarter. A separate series from the daily observations above; a 403 here means Common Crawl was refused, not this ledger.

CrawlHostStateGPTBotOAI-SearchBotChatGPT-UserClaudeBotClaude-SearchBotClaude-UserPerplexityBot
2026-09-21 CC-MAIN-2026-39ad-contents.jpok viewallowsallowsunknownallowsallowsunknownallows
2025-09-15 CC-MAIN-2025-38ad-contents.jpok viewallowsallowsunknownallowsallowsunknownallows
2023-10-02 CC-MAIN-2023-40ad-contents.jpok viewallowsallowsunknownallowsallowsunknownallows
2022-10-03 CC-MAIN-2022-40ad-contents.jpok viewallowsallowsunknownallowsallowsunknownallows
2021-09-27 CC-MAIN-2021-39ad-contents.jpok viewallowsallowsunknownallowsallowsunknownallows
2020-09-28 CC-MAIN-2020-40ad-contents.jpok viewallowsallowsunknownallowsallowsunknownallows
2019-09-23 CC-MAIN-2019-39ad-contents.jpok viewallowsallowsunknownallowsallowsunknownallows
2018-09-24 CC-MAIN-2018-39ad-contents.jpok viewallowsallowsunknownallowsallowsunknownallows
2018-01-29 CC-MAIN-2018-05ad-contents.jpok viewallowsallowsunknownallowsallowsunknownallows
2017-09-25 CC-MAIN-2017-39ad-contents.jpok viewallowsallowsunknownallowsallowsunknownallows
2017-01-23 CC-MAIN-2017-04ad-contents.jpok viewallowsallowsunknownallowsallowsunknownallows

Evidence

Every daily observation of ad-contents.jp is a leaf in that day's Merkle tree. Proof of the robots.txt line for 2026-10-27: audit path (JSON), day root and OpenTimestamps proof (complete (bitcoin block 973493)).

API: https://infrarabbit.com/crawlers/api/v1/policy/ad-contents.jp