Pith Number

pith:6WX3WK6Z

pith:2021:6WX3WK6ZVYVYDPYCFWK3ZMXPCK

not attested not anchored not stored refs pending

Biosignatures of the Earth I. Airborne spectropolarimetric detection of photosynthetic life

Antoine Pommerol, Brice O. Demory, C.H. Lucas Patty, Christoph Keller, Daphne M. Stam, Frans Snik, H. Jens Hoeijmakers, Jonas G. K\"uhn, Olivier Poch, Petar H. Lambrev, Stefano Spadaccia, Vidhya Pallichadath, Willeke Mulder

arxiv:2106.00493 v1 · 2021-06-01 · astro-ph.EP · astro-ph.IM · physics.bio-ph · q-bio.BM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6WX3WK6ZVYVYDPYCFWK3ZMXPCK}

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	2026-07-05T02:57:47.291675Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f5afbb2bd9ae2b81bf022d95bcb2ef12925bcdbd1a01332f5ba20e03c286ae9d

Aliases

arxiv: 2106.00493 · arxiv_version: 2106.00493v1 · doi: 10.48550/arxiv.2106.00493 · pith_short_12: 6WX3WK6ZVYVY · pith_short_16: 6WX3WK6ZVYVYDPYC · pith_short_8: 6WX3WK6Z

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/6WX3WK6ZVYVYDPYCFWK3ZMXPCK \
  | 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: f5afbb2bd9ae2b81bf022d95bcb2ef12925bcdbd1a01332f5ba20e03c286ae9d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2e4f461405ad3107d47589e8adfedb13dd08f64ba84f4a4b045daef8fb8a96c",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "physics.bio-ph",
      "q-bio.BM"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2021-06-01T13:53:57Z",
    "title_canon_sha256": "ab3db75da03c229d255b6fe3c3a9899bcb5a979983e85600c2cd7895a5a303dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.00493",
    "kind": "arxiv",
    "version": 1
  }
}