Pith Number

pith:XRKVYWTS

pith:2025:XRKVYWTS2I7PFZVXGV4AWOQG6G

not attested not anchored not stored refs pending

Open Questions about Time and Self-reference in Living Systems

Charles Ofria, Leo S. D. Caves, Michael Levin, Penousal Machado, Roger White, Samson Abramsky, Susan Stepney, Wolfgang Banzhaf

arxiv:2508.11423 v2 · 2025-08-15 · cs.ET · q-bio.OT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XRKVYWTS2I7PFZVXGV4AWOQG6G}

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	2026-06-30T01:17:25.321878Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc555c5a72d23ef2e6b735780b3a06f1a42f58a598f9d5e80a7945c677d9c4bd

Aliases

arxiv: 2508.11423 · arxiv_version: 2508.11423v2 · doi: 10.48550/arxiv.2508.11423 · pith_short_12: XRKVYWTS2I7P · pith_short_16: XRKVYWTS2I7PFZVX · pith_short_8: XRKVYWTS

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/XRKVYWTS2I7PFZVXGV4AWOQG6G \
  | 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: bc555c5a72d23ef2e6b735780b3a06f1a42f58a598f9d5e80a7945c677d9c4bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4c4fbc9ca9048c45639035fd8bb9bb4f51f5967e4d8e9bb6dc09d9e9ad2a65a",
    "cross_cats_sorted": [
      "q-bio.OT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.ET",
    "submitted_at": "2025-08-15T11:58:59Z",
    "title_canon_sha256": "9bb661165ba4076c2e474589a51087e9977c56b9b13bd1e5a6d61c05a088a8eb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.11423",
    "kind": "arxiv",
    "version": 2
  }
}