Pith Number

pith:UP77R36B

pith:2025:UP77R36BZUDCH3TBA2PUYG4OLS

not attested not anchored not stored refs pending

RetroChat: Designing for the Preservation of Past Digital Experiences

Huanmin Yi, Kexue Fu, RAY LC, Suifang Zhou

arxiv:2505.17208 v1 · 2025-05-22 · 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{UP77R36BZUDCH3TBA2PUYG4OLS}

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	2026-07-05T11:07:48.861575Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3fff8efc1cd0623ee61069f4c1b8e5ca64aadfe15b8909105f9b42f44b27f2e

Aliases

arxiv: 2505.17208 · arxiv_version: 2505.17208v1 · doi: 10.48550/arxiv.2505.17208 · pith_short_12: UP77R36BZUDC · pith_short_16: UP77R36BZUDCH3TB · pith_short_8: UP77R36B

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/UP77R36BZUDCH3TBA2PUYG4OLS \
  | 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: a3fff8efc1cd0623ee61069f4c1b8e5ca64aadfe15b8909105f9b42f44b27f2e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b2a9c5428609746e9d304a24b7c7269ef6f39556af8f59f0316e5adb0a7525b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.HC",
    "submitted_at": "2025-05-22T18:33:05Z",
    "title_canon_sha256": "49a78b5ded382135db5243b876050337a329e0b2ca5ca10ec84b02b2131b7fcc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.17208",
    "kind": "arxiv",
    "version": 1
  }
}