Pith Number

pith:DM55VO57

pith:2018:DM55VO57ULWRID42ZE45WRANTD

not attested not anchored not stored refs pending

Interstellar communication. X. The colors of optical SETI

Michael Hippke

arxiv:1804.01249 v1 · 2018-04-04 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DM55VO57ULWRID42ZE45WRANTD}

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	2026-05-17T23:58:41.786829Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b3bdabbbfa2ed140f9ac939db440d98f8d9ffe1f2ab76c3e7435231b98b0edf

Aliases

arxiv: 1804.01249 · arxiv_version: 1804.01249v1 · doi: 10.48550/arxiv.1804.01249 · pith_short_12: DM55VO57ULWR · pith_short_16: DM55VO57ULWRID42 · pith_short_8: DM55VO57

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/DM55VO57ULWRID42ZE45WRANTD \
  | 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: 1b3bdabbbfa2ed140f9ac939db440d98f8d9ffe1f2ab76c3e7435231b98b0edf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "428e2ed32dc56da7f556f658bafbcdb2abc9f3053b35a953bc3c5400b7ad533d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-04-04T06:24:52Z",
    "title_canon_sha256": "ffccecf8ab712a9b935ebefb02dbc0a30bde4fc1292a948692f5fcdebcecf662"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.01249",
    "kind": "arxiv",
    "version": 1
  }
}