Pith Number

pith:Q7ISPIBY

pith:2026:Q7ISPIBY72OD4P7KJV3IEVYD2S

not attested not anchored not stored refs pending

Toward Practical Decentralized Proof-of-Location via Physical Witnessing Zones

Amnir Hadachi, Eduardo Brito, Tamor Tomson, Ulrich Norbisrath

arxiv:2608.04957 v1 · 2026-08-05 · cs.CR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q7ISPIBY72OD4P7KJV3IEVYD2S}

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	2026-08-06T01:47:46.690458Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

87d127a038fe9c3e3fea4d76825703d4aa0d60beafbb8159a40c7a2532ba76cb

Aliases

arxiv: 2608.04957 · arxiv_version: 2608.04957v1 · doi: 10.48550/arxiv.2608.04957 · pith_short_12: Q7ISPIBY72OD · pith_short_16: Q7ISPIBY72OD4P7K · pith_short_8: Q7ISPIBY

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/Q7ISPIBY72OD4P7KJV3IEVYD2S \
  | 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: 87d127a038fe9c3e3fea4d76825703d4aa0d60beafbb8159a40c7a2532ba76cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a61db0d5e676d8ab456c7e331dd5ddb0177089bea99c4325af518f2e95d4b55",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2026-08-05T15:27:42Z",
    "title_canon_sha256": "04f74353eb4d119a76cd902998d85b6e5304984c000b60f01bc7ca6ab89ca17d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2608.04957",
    "kind": "arxiv",
    "version": 1
  }
}