Register 12 · Cryptography primitives

Hash chain.

Hash chain — a reference page in the Cryptography primitives register.

Open the Console See how a record is checked
register 12 · Cryptography primitives· reference mark
01 ·

What this is.

twelve marks · the evidence record's actual machinery · same construction · 200×200 · integer geometry · currentColor + brass-deep

Use. each block carries the previous block's hash.

Source. 5 linked blocks with brass continuation arrows.

Register. 12 · Cryptography primitives — one of the 17 registers of the PLANiSPHERE corpus library.

02 ·

See it work.

Evidence record you can check — not code you have to trust.

Planisphere measures your tool deployment against Hash chain and seals the result into a signed, Merkle-rooted evidence record. The grade recomputes on your own hardware; the model state never crosses the boundary.

See the record demo →See how a record is checked
03 ·

Promise. atom

The contract this mark binds — derived, not asserted.

Hash chain — a reference page in the Cryptography primitives register.

Answers: What is Hash chain in the Planisphere corpus library?

04 ·

Adjacent marks, same instrument.

Related marks, and the surface this one funnels to.

Hash chain is a reference mark in the Cryptography primitives register. Read the related buyer-facing product context at /evidence.

Base32 reg 12 · alphanumeric encoding · 5-bit chunks CID reg 12 · content identifier · multihash with code prefix Content-addressable store reg 12 · addressed by what it is, not where it lives Ed25519 signature reg 12 · twisted-curve signature primitive Inclusion proof reg 12 · path from one leaf to the root
05 ·

Routes here from.

Where this mark is referenced in the Planisphere surface.
About

Any internal link in the Planisphere site that names "Hash chain" canonicalises here.

06 ·

Sibling marks. Cryptography primitives

Same register · same construction.
SHA-256 digest
collapsing variable input to a fixed 64-char hash
wave of varying bars → arrow → 4 brass output bars
Ed25519 signature
twisted-curve signature primitive
figure-8 elliptic curve + brass key dot
Merkle root
the single brass node atop the tree
large brass root + descending branches + 4 leaves
Inclusion proof
path from one leaf to the root
tree with one path drawn in brass
CID
content identifier · multihash with code prefix
stacked rectangles representing hash prefix + content
Public key
open teeth · meant to be shared
key ring + shaft + outward teeth + brass ring
Private key
sealed teeth · never leaves the holder
key with inward teeth + brass sealed ring + lock
Nonce
a number used once · single-use entropy
a single brass token + diagonal slash through it
Timestamp signature
clock face + a signature mark
circle + hands + brass swirl beneath
Base32
alphanumeric encoding · 5-bit chunks
compact grid of cells, brass-filled subset
Content-addressable store
addressed by what it is, not where it lives
stack of blocks each labeled with its hash prefix

See the record Hash chain asks for.

The console shows the evidence; the docs show the endpoints; the briefing shows what the product does and does not claim.

Open the Console Read the Docs Read the capability briefing
API ·

When a regulator asks for proof, hand over records — not assurances.

record the duty · seal the receipt · verify offline

Planisphere records each duty event — an output marked, a disclosure shown, a review made — and seals it into a receipt that verifies offline against our published keys. You send hashes, never content. A record is evidence a third party can check; it is not a certification and not a legal determination.

Open the Console Read the Docs Read the capability briefing

See how a record is checked