Daily chain · external anchor
A hash chain detects tampering with one record, but not recomputing the whole chain and replacing it — unless something outside disagrees.
This table is that something. One chain per day; its sha256 and the public commit that carries it.
| Chain date | Public commit | File sha256 | Records |
|---|---|---|---|
| 2026-09-23 | 2a25af2e1734 | 386ca8774fc7513a6cd4d3b580125930b4e4f3ba3491056cafd3fa662da397c5 | 14 |
| 2026-09-22 | 3c52786d373e | 101a16e0e37855317203a3b48185fa4651fcb71d4161e25b849a3cda7d4941b5 | 14 |
Every sha256 here was computed on the spot by downloading the file at that commit — not a constant we typed in. Click the commits and check.
Scope (stated plainly)
- Public daily chains: 2 days (re-read every time this page is generated).
- The local ledger has 13 more days that are not in the public repo (they contain local dev activity).
- ⇒ The external anchor covers the days in the table above. Outside them, only the local ledger can recompute; this page cannot prove "the whole chain was not recomputed".
Check it yourself
git clone https://github.com/sotaex/agentstate.git && cd agentstate
git checkout 2a25af2e1734d024803b15361148c189c3974aab
sha256sum challenge/chain/2026-09-23.jsonl
So how far does "change it and you win" hold?
| Attack | Detected? |
|---|---|
| Change one byte | Yes, immediately, and it names the record |
| Delete / insert a record | Yes, and it names the position |
| Recompute the whole chain and replace it | Yes — for the days published above |
| Recompute the chain AND rewrite the public commit history | No — that is no longer editing the chain, it is editing GitHub |
That is as far as we can honestly go. One step further needs third-party timestamping (OTS / blockchain / DNS TXT). We have not done that, and we do not pretend we have.
Cite this page
Antinel AgentState. Daily chain · external anchor — AgentState. https://antinel.com/en/agentstate/chain/ (accessed YYYY-MM-DD)
Antinel. (2026). Daily chain · external anchor — AgentState. AgentState. https://antinel.com/en/agentstate/chain/
BibTeX
@misc{antinel_en_agentstate_chain,
title = {Daily chain · external anchor — AgentState},
author = {{Antinel}},
year = {2026},
url = {https://antinel.com/en/agentstate/chain/},
note = {claim tier: measured}
}
Claim tier: measured 采集时刻：2026-09-24T14:53:19+08:00