Pith Number

pith:A52WPKJW

pith:2014:A52WPKJWR4FZCMIW3GI3LABJ27

not attested not anchored not stored refs pending

OpenCourseWare Observatory -- Does the Quality of OpenCourseWare Live up to its Promise?

Christoph Lange, Sahar Vahdati, S\"oren Auer

arxiv:1410.5694 v2 · 2014-10-21 · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{A52WPKJWR4FZCMIW3GI3LABJ27}

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	2026-05-18T02:18:51.592257Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

077567a9368f0b913116d991b58029d7f4de7b27e1235911b1badd8bda12574b

Aliases

arxiv: 1410.5694 · arxiv_version: 1410.5694v2 · doi: 10.48550/arxiv.1410.5694 · pith_short_12: A52WPKJWR4FZ · pith_short_16: A52WPKJWR4FZCMIW · pith_short_8: A52WPKJW

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/A52WPKJWR4FZCMIW3GI3LABJ27 \
  | 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: 077567a9368f0b913116d991b58029d7f4de7b27e1235911b1badd8bda12574b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "475fddf0ff41f7df72ed33828fe73d7f8a3c06ed37fdda931ea723c5c7a09b8e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2014-10-21T14:54:56Z",
    "title_canon_sha256": "a9059510c930c6b5d37845ad56b12a005d7068a62c801911f4ef62e60e5ac28a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1410.5694",
    "kind": "arxiv",
    "version": 2
  }
}