Pith Number

pith:2BY7FQJB

pith:2014:2BY7FQJB4RNZT7TYOQV3SK4HUZ

not attested not anchored not stored refs pending

LineCAPTCHA Mobile: A User Friendly Replacement for Unfriendly Reverse Turing Tests for Mobile Devices (ICIAfS14)

C.B Bulumulla, R. G. Ragel

arxiv:1412.7677 v1 · 2014-12-24 · cs.HC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2BY7FQJB4RNZT7TYOQV3SK4HUZ}

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	2026-05-18T02:30:33.287864Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d071f2c121e45b99fe78742bb92b87a659265c4cb507a6c288aab21e900473b7

Aliases

arxiv: 1412.7677 · arxiv_version: 1412.7677v1 · doi: 10.48550/arxiv.1412.7677 · pith_short_12: 2BY7FQJB4RNZ · pith_short_16: 2BY7FQJB4RNZT7TY · pith_short_8: 2BY7FQJB

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/2BY7FQJB4RNZT7TYOQV3SK4HUZ \
  | 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: d071f2c121e45b99fe78742bb92b87a659265c4cb507a6c288aab21e900473b7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b808f12ffe50b1855ae98962eac505fb7eda233856e6d36953d419a386043c65",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.HC",
    "submitted_at": "2014-12-24T14:49:14Z",
    "title_canon_sha256": "5ed038d1b9e9c71301af019e3c6d8baf5a9dbe3fbbeac8ca0233f9facb569791"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.7677",
    "kind": "arxiv",
    "version": 1
  }
}