Pith Number

pith:C6YTBXMQ

pith:2021:C6YTBXMQCFR5ML7MZLWU6KUJ2F

not attested not anchored not stored refs pending

COPER: a Query-adaptable Semantics-based Search Engine for Persian COVID-19 Articles

Mehdi Allahyari, Mitra Sadat Mirshafiee, Reza Khanmohammadi

arxiv:2107.05722 v2 · 2021-07-12 · cs.IR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C6YTBXMQCFR5ML7MZLWU6KUJ2F}

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	2026-07-05T02:57:56.258898Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

17b130dd901163d62feccaed4f2a89d16d4fa7c8c296b9ece3ee95f4f92b07d1

Aliases

arxiv: 2107.05722 · arxiv_version: 2107.05722v2 · doi: 10.48550/arxiv.2107.05722 · pith_short_12: C6YTBXMQCFR5 · pith_short_16: C6YTBXMQCFR5ML7M · pith_short_8: C6YTBXMQ

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/C6YTBXMQCFR5ML7MZLWU6KUJ2F \
  | 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: 17b130dd901163d62feccaed4f2a89d16d4fa7c8c296b9ece3ee95f4f92b07d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "276e43ec4ebcca206a69acb51a2303d2c018b674afabf190c4914a62b89d2a43",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2021-07-12T20:25:56Z",
    "title_canon_sha256": "031c7c817ff064270b558b12abd188990c906d610d6e0b3fb9d4c194f353f6e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.05722",
    "kind": "arxiv",
    "version": 2
  }
}