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Pith Number record

pith:ZQI7K3YW

pith:2016:ZQI7K3YWNLTFUY2YOU3IQAPM3D
Protocol content-addressed Pith receipt schema 1.0
Author
not author-attested
Timestamp
not externally anchored
Storage
storage not verified
References
references not resolved

Model-independent determination on $H_0$ using the latest $H(z)$ data

Deng Wang, Xin-he Meng

Source: arxiv:1610.01202 v1 · Submitted 2016-10-01 · License http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Categories: gr-qc · astro-ph.CO

Open Pith paper page Download JSON What is a Pith Number?

Record completeness checklist

Each row is a typed event attached to this Pith Number. Done rows show their third-party proof. Open rows have an inline form so you can complete them without leaving this page.

1 Anchor canonical hash to Bitcoin via OpenTimestamps open
Stamps the canonical SHA-256 (cc11f56f166ae65a63587536...) across three calendars. Confirms instantly. Calendars upgrade to a Bitcoin-block proof in a few hours.
Free. No account. Anyone can re-stamp; each stamp is an independent calendar receipt.
2 Mirror to Internet Archive (Wayback Machine) open
Submits the paper URL to the Internet Archive and records the resulting Wayback capture URL plus timestamp. Pith does not host the paper.
Free, anonymous, third-party preservation.
3 Claim authorship open
Identity-backed. The same flow as the paper page. Sign in with ORCID, Apple, X, or email magic-link; if your ORCID is on the arXiv author list the attestation is one-click and shows ORCID verified.
Returns you right back here after sign-in.
4 Sign a citation pointing at this record open
Records a signed citation. Pick a relationship (supports, refutes, extends, uses_method, depends_on, replaces, compares, cites). Pith signs the assertion server-side.
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Held for moderation. Sign in to confirm immediately.
5 Submit replication, falsification, or formal bridge open
Public record of a replication attempt, formal bridge (Lean / Coq), or falsification. Held for moderation. Not peer review; a typed annotation.
More options
Held for moderation before it appears as confirmed.

Claims

Inbound citations

1 paper in Pith references this work. 1 of those cite a specific Pith anchor.

EFT of Dark Energy with Cosmic Chronometers: Reconstructing Background EFT Functions
arXiv:2512.03314 · ref [30] · internal Pith anchor

Receipt

First computed 2026-05-18T01:03:11.426775Z
Builder pith-number-builder-2026-05-17-v1
Signature Pith Ed25519 (pith-v1-2026-05, fingerprint 8d4b5ee74e4693bc…) · public key
Signature value r8nMQ0zOlrIQYRv7oL67AaEq4tr8WUKjwGuE9HX6ifzVmu2Qpmd2bCAPDhwwRXJPX6cizpbw4l5qd5hTLcqjCA==
Schema pith-number/v1.0

Canonical hash

cc11f56f166ae65a635875368801ecd8e1e1c3c370abfef249c4d3fac0916e7d

Aliases

Kind Value
arxiv 1610.01202
arxiv_version 1610.01202v1
doi 10.48550/arxiv.1610.01202

Agent API

Same address serves humans and agents. Add an Accept header to get the JSON-LD payload at the resolver URL itself.

Resolver JSON Graph JSON Events JSON Schema Signing key Resolve alias

Verify this Pith Number yourself

Three shell lines recompute the canonical hash. If the hash you compute matches the one shown above, the record is intact end-to-end.

curl -sH 'Accept: application/ld+json' https://pith.science/pith/ZQI7K3YWNLTFUY2YOU3IQAPM3D \
  | 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: cc11f56f166ae65a635875368801ecd8e1e1c3c370abfef249c4d3fac0916e7d

Verify the Pith Ed25519 signature against the published public key:

curl -s https://pith.science/pith-signing-key.json | jq -r .public_key_b64 \
  | base64 -d > /tmp/pith_pub.bin
python3 -c "
from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PublicKey
import base64
pub = Ed25519PublicKey.from_public_bytes(open('/tmp/pith_pub.bin','rb').read())
sig = base64.b64decode('r8nMQ0zOlrIQYRv7oL67AaEq4tr8WUKjwGuE9HX6ifzVmu2Qpmd2bCAPDhwwRXJPX6cizpbw4l5qd5hTLcqjCA==')
digest = bytes.fromhex('cc11f56f166ae65a635875368801ecd8e1e1c3c370abfef249c4d3fac0916e7d')
pub.verify(sig, digest)
print('signature OK')"
Show canonical record JSON 
{
  "metadata": {
    "abstract_canon_sha256": "0099acc2d512726c16976bbad995445422665b71b854deb9b844f63074bb668f",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2016-10-01T14:17:12Z",
    "title_canon_sha256": "fb9b1d0735a7980174f7794b5f644cb30372c741fb74c165e657e8040ad82532"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1610.01202",
    "kind": "arxiv",
    "version": 1
  }
}