Pith Number

pith:IQBB5PBH

pith:2025:IQBB5PBHM4AHHGAYLTQZOCTXAD

not attested not anchored not stored refs pending

On the (in)security of Proofs-of-Space based Longest-Chain Blockchains

Krzysztof Pietrzak, Mirza Ahad Baig

arxiv:2505.14891 v1 · 2025-05-20 · 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{IQBB5PBHM4AHHGAYLTQZOCTXAD}

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	2026-07-05T11:06:36.954065Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

44021ebc2767007398185ce1970a7700ccf3735637a2bca453f6592cac2d8472

Aliases

arxiv: 2505.14891 · arxiv_version: 2505.14891v1 · doi: 10.48550/arxiv.2505.14891 · pith_short_12: IQBB5PBHM4AH · pith_short_16: IQBB5PBHM4AHHGAY · pith_short_8: IQBB5PBH

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/IQBB5PBHM4AHHGAYLTQZOCTXAD \
  | 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: 44021ebc2767007398185ce1970a7700ccf3735637a2bca453f6592cac2d8472

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb7f98a35295de77d6079bfc90bc5c19027a42e16b8182878007500c7e226544",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2025-05-20T20:35:00Z",
    "title_canon_sha256": "d6e76c3ef9ae9b255e1c19c81e3a46797dc18df45e88ebda844026aea94860ca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.14891",
    "kind": "arxiv",
    "version": 1
  }
}