Pith Number

pith:ZTBZC5YK

pith:2019:ZTBZC5YKRJQDFZY4NWNHT6D4Y4

not attested not anchored not stored refs pending

Towards a Multi-Chain Future of Proof-of-Space

Dawu Gu, Jilai Zheng, Shuyang Tang, Yao Deng, Zhiqiang Liu, Ziyu Wang

arxiv:1907.07896 v1 · 2019-07-18 · cs.CR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZTBZC5YKRJQDFZY4NWNHT6D4Y4}

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	2026-05-17T23:40:15.797859Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ccc391770a8a6032e71c6d9a79f87cc736e7554a9914d3b86b79e131ad5d5aa9

Aliases

arxiv: 1907.07896 · arxiv_version: 1907.07896v1 · doi: 10.48550/arxiv.1907.07896 · pith_short_12: ZTBZC5YKRJQD · pith_short_16: ZTBZC5YKRJQDFZY4 · pith_short_8: ZTBZC5YK

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/ZTBZC5YKRJQDFZY4NWNHT6D4Y4 \
  | 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: ccc391770a8a6032e71c6d9a79f87cc736e7554a9914d3b86b79e131ad5d5aa9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0cbfb24c2f8a9849695fdbc0f22bf1ab4b7fd965811c25466bde4d4d37e9ad5c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2019-07-18T06:44:47Z",
    "title_canon_sha256": "9312da705bbe67b3b170702ce65f4565b54c644a5dfe855a0c2f9545567bf141"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.07896",
    "kind": "arxiv",
    "version": 1
  }
}