Pith Number

pith:R457MV2G

pith:2026:R457MV2GTKPDFGGWQZSXKDCLB2

not attested not anchored not stored refs pending

One Token Is Enough: Fingerprinting and Verifying Large Language Models from Single-Token Output Distributions

Tomas Bruckner

arxiv:2607.10252 v1 · 2026-07-11 · cs.CR · cs.CL · cs.LG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R457MV2GTKPDFGGWQZSXKDCLB2}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-14T01:20:32.977669Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f3bf657469a9e3298d68665750c4b0eb40da2c08380021a121665d83faa1f16

Aliases

arxiv: 2607.10252 · arxiv_version: 2607.10252v1 · doi: 10.48550/arxiv.2607.10252 · pith_short_12: R457MV2GTKPD · pith_short_16: R457MV2GTKPDFGGW · pith_short_8: R457MV2G

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/R457MV2GTKPDFGGWQZSXKDCLB2 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 8f3bf657469a9e3298d68665750c4b0eb40da2c08380021a121665d83faa1f16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9fe47e5322b3b63edc88a1f5ea251b059b70b754b8506ed845fed293d7baab42",
    "cross_cats_sorted": [
      "cs.CL",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2026-07-11T10:34:17Z",
    "title_canon_sha256": "67148033e8d0c07c30e932969bfe4690734604e005ee9df0e731711212c55a7c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.10252",
    "kind": "arxiv",
    "version": 1
  }
}