Pith Number

pith:BHQU47PV

pith:2021:BHQU47PV7LEVZYY5MIA2DO3FWP

not attested not anchored not stored refs pending

ExcavatorCovid: Extracting Events and Relations from Text Corpora for Temporal and Causal Analysis for COVID-19

Alexander Zamanian, Benjamin Rozonoyer, Bonan Min, Haoling Qiu, Jessica MacBride

arxiv:2105.01819 v1 · 2021-05-05 · 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{BHQU47PV7LEVZYY5MIA2DO3FWP}

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	2026-07-05T02:37:48.706529Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

09e14e7df5fac95ce31d6201a1bb65b3e2b4645ef4d57f34e7a9b871555cdfb5

Aliases

arxiv: 2105.01819 · arxiv_version: 2105.01819v1 · doi: 10.48550/arxiv.2105.01819 · pith_short_12: BHQU47PV7LEV · pith_short_16: BHQU47PV7LEVZYY5 · pith_short_8: BHQU47PV

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/BHQU47PV7LEVZYY5MIA2DO3FWP \
  | 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: 09e14e7df5fac95ce31d6201a1bb65b3e2b4645ef4d57f34e7a9b871555cdfb5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2e71b29fedf75571ee82b7f789a1ba76ccef3cd1b36232445abd30fd6f83977",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-05-05T01:18:46Z",
    "title_canon_sha256": "9e05bf2cea19c0ceed54ec61591aa1aaf105c0f9389543a1382c134f655fea71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.01819",
    "kind": "arxiv",
    "version": 1
  }
}