Pith Number

pith:PTCUUWPM

pith:2021:PTCUUWPM5DADGAQ5JZABYSRQM5

not attested not anchored not stored refs pending

Topic Modeling and Progression of American Digital News Media During the Onset of the COVID-19 Pandemic

Hakim Ghazzai, Michael C. Lucic, Xiangpeng Wan, Yehia Massoud

arxiv:2106.09572 v1 · 2021-05-25 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PTCUUWPM5DADGAQ5JZABYSRQM5}

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	2026-07-05T02:50:17.373070Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7cc54a59ece8c033021d4e401c4a30676ca5be55cb07c5b1c8a625cfce1e47cd

Aliases

arxiv: 2106.09572 · arxiv_version: 2106.09572v1 · doi: 10.48550/arxiv.2106.09572 · pith_short_12: PTCUUWPM5DAD · pith_short_16: PTCUUWPM5DADGAQ5 · pith_short_8: PTCUUWPM

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/PTCUUWPM5DADGAQ5JZABYSRQM5 \
  | 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: 7cc54a59ece8c033021d4e401c4a30676ca5be55cb07c5b1c8a625cfce1e47cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e34087a964b313054d7b3627073b81ed7e3ec18c62de4da5a50402ad10833a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-05-25T14:27:47Z",
    "title_canon_sha256": "f9669ea16180c50f6e34fbb660086fc5511ea8072ebb0fb67607a2ce8fa66d51"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.09572",
    "kind": "arxiv",
    "version": 1
  }
}