Pith Number

pith:6CR72EPP

pith:2018:6CR72EPPE6VHTY22CW4N4TXG2O

not attested not anchored not stored refs pending

Possible Photometric Signatures of Moderately Advanced Civilizations: The Clarke Exobelt

Hector Socas-Navarro

arxiv:1802.07723 v1 · 2018-02-21 · astro-ph.EP · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6CR72EPPE6VHTY22CW4N4TXG2O}

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	2026-05-18T00:20:02.019214Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0a3fd11ef27aa79e35a15b8de4ee6d3b448daa2a1633b98bff077565882bd3b

Aliases

arxiv: 1802.07723 · arxiv_version: 1802.07723v1 · doi: 10.48550/arxiv.1802.07723 · pith_short_12: 6CR72EPPE6VH · pith_short_16: 6CR72EPPE6VHTY22 · pith_short_8: 6CR72EPP

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/6CR72EPPE6VHTY22CW4N4TXG2O \
  | 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: f0a3fd11ef27aa79e35a15b8de4ee6d3b448daa2a1633b98bff077565882bd3b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1da3d24e4cf71ad8dfecfed0b8d3a310e33e4128656a39ca3e1a83341922b1f2",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2018-02-21T17:05:28Z",
    "title_canon_sha256": "1b23fcee88f674a234f824b628113dd96310d2420a07ce2bc9a6265136178825"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.07723",
    "kind": "arxiv",
    "version": 1
  }
}