Pith Number

pith:CW2S2SP7

pith:2026:CW2S2SP7GPCOPSHGV42AC5JQDW

not attested not anchored not stored refs pending

Making Open-Source Text LLM Watermarks Durable Against Merging

Luisa Scharff, Martin Vechev, Robin Staab, Thibaud Gloaguen

arxiv:2607.20435 v1 · 2026-05-11 · cs.CL · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CW2S2SP7GPCOPSHGV42AC5JQDW}

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	2026-07-24T00:23:15.314817Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

15b52d49ff33c4e7c8e6af340175301d8dd552aa228d586b39294cf1c6a00779

Aliases

arxiv: 2607.20435 · arxiv_version: 2607.20435v1 · doi: 10.48550/arxiv.2607.20435 · pith_short_12: CW2S2SP7GPCO · pith_short_16: CW2S2SP7GPCOPSHG · pith_short_8: CW2S2SP7

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/CW2S2SP7GPCOPSHGV42AC5JQDW \
  | 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: 15b52d49ff33c4e7c8e6af340175301d8dd552aa228d586b39294cf1c6a00779

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc054bfdb2c01d024d460dcf4f1765c0f4de248072823ff20a7e322dbc5ba960",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-05-11T11:52:46Z",
    "title_canon_sha256": "85f36e672f2a60088e897f81afb131ff86b61594d2039cc1fb2049877b96d184"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.20435",
    "kind": "arxiv",
    "version": 1
  }
}