Pith Number

pith:KIPR7457

pith:2019:KIPR7457FCVRKTWVCNAZG2JVV5

not attested not anchored not stored refs pending

The History of Digital Spam

Emilio Ferrara

arxiv:1908.06173 v1 · 2019-08-14 · cs.CY · cs.HC · cs.LG · cs.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KIPR7457FCVRKTWVCNAZG2JVV5}

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	2026-07-04T23:58:13.277459Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

521f1ff3bf28ab154ed51341936935af5e39415f0d76d5627ef1471d3809cf76

Aliases

arxiv: 1908.06173 · arxiv_version: 1908.06173v1 · doi: 10.48550/arxiv.1908.06173 · pith_short_12: KIPR7457FCVR · pith_short_16: KIPR7457FCVRKTWV · pith_short_8: KIPR7457

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/KIPR7457FCVRKTWVCNAZG2JVV5 \
  | 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: 521f1ff3bf28ab154ed51341936935af5e39415f0d76d5627ef1471d3809cf76

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2408735e568012c476c05668a6bdb4a7af59f0f3bf19bacf945b775eef2e7cc3",
    "cross_cats_sorted": [
      "cs.HC",
      "cs.LG",
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2019-08-14T00:14:54Z",
    "title_canon_sha256": "59fe2cf2199dbb823e86855dbdb894eba6e15fe7e9d60b9a4fa081e4b25fb91f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.06173",
    "kind": "arxiv",
    "version": 1
  }
}