Pith Number

pith:IPSOTODL

pith:2019:IPSOTODL5TEZ53VJKNMVTIUOQF

not attested not anchored not stored refs pending

9.6 Million Links in Source Code Comments: Purpose, Evolution, and Decay

Christoph Treude, Hideaki Hata, Raula Gaikovina Kula, Takashi Ishio

arxiv:1901.07440 v2 · 2019-01-22 · cs.SE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IPSOTODL5TEZ53VJKNMVTIUOQF}

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	2026-05-17T23:53:57.143395Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

43e4e9b86becc99eeea9535959a28e814c0f8224c505cf4a321537aeeb5bd2b2

Aliases

arxiv: 1901.07440 · arxiv_version: 1901.07440v2 · doi: 10.48550/arxiv.1901.07440 · pith_short_12: IPSOTODL5TEZ · pith_short_16: IPSOTODL5TEZ53VJ · pith_short_8: IPSOTODL

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/IPSOTODL5TEZ53VJKNMVTIUOQF \
  | 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: 43e4e9b86becc99eeea9535959a28e814c0f8224c505cf4a321537aeeb5bd2b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c564a916de356fabec7796c37f60fe8cb731f09b2ae4756c44ab17c208d41f0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2019-01-22T16:03:16Z",
    "title_canon_sha256": "4aa2e5caf01209f15253f7f9972460502092f62ff2900650e02c6d2a728b84c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.07440",
    "kind": "arxiv",
    "version": 2
  }
}