Pith Number

pith:VJWXEOEE

pith:2018:VJWXEOEEMBSPILI3W3DX7VAAEQ

not attested not anchored not stored refs pending

Reimplementation and Reinterpretation of the Copycat Project

Hongyi Huang

arxiv:1811.04747 v1 · 2018-10-26 · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VJWXEOEEMBSPILI3W3DX7VAAEQ}

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	2026-05-18T00:01:04.170827Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aa6d7238846064f42d1bb6c77fd40024275326ab424ccd4f0868224cdfe9c43c

Aliases

arxiv: 1811.04747 · arxiv_version: 1811.04747v1 · doi: 10.48550/arxiv.1811.04747 · pith_short_12: VJWXEOEEMBSP · pith_short_16: VJWXEOEEMBSPILI3 · pith_short_8: VJWXEOEE

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/VJWXEOEEMBSPILI3W3DX7VAAEQ \
  | 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: aa6d7238846064f42d1bb6c77fd40024275326ab424ccd4f0868224cdfe9c43c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1b8349cc14ced88fec0dbb0e1b996825ed3c1053e524136b985d06b98154828b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2018-10-26T00:55:45Z",
    "title_canon_sha256": "d0f69495935797c5d123d3551e002d5f0eeb3bb7009dd19bfe7c05857ee7f071"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.04747",
    "kind": "arxiv",
    "version": 1
  }
}