Registered Pages
Every page has a
provable identity.
Physical notebooks where every page carries a unique SF128 cryptographic identifier and scannable 2D symbol. Verifiable page-level provenance for research, legal, and archival use.
What makes a registered page
Each page in a registered notebook carries three elements that together create an unbreakable chain of provenance.
2D Symbol
A Data Matrix code printed on every page. Scan it to resolve the page's SF128 identifier and verify its place in the notebook.
SF128 Seal
A unique circular visual glyph derived from the page's 128-bit identity. Visually distinct, instantly recognizable, impossible to forge.
Cryptographic Derivation
Page identifiers are deterministically derived from the notebook's root SF128 using BLAKE3. The sequence is verifiable but unpredictable.
Checkpoint Pages
At configurable intervals, a full-width verification page carries the Merkle proof for the preceding block of pages.
How the derivation works
A single root identifier generates an entire notebook. Every page identity is deterministic, verifiable, and cryptographically bound to the root.
The root SF128 is a 128-bit snowflake identifier minted by registrar.earth. Page identifiers inherit the root's timestamp, datacenter, and worker fields, with the lower 52 bits replaced by the BLAKE3 derivation. This means every page can be independently verified against the root — you don't need the full notebook to check one page.
The 2D symbols
Every page carries two machine-readable representations of its identity.
Data Matrix
High-density 2D barcode encoding the full 16-character SF128 token. Resilient to partial damage. Printed at page footer.
SF128 Seal
Circular visual glyph generated from the identifier's bit structure. Functions as a human-recognizable watermark.
-E052-B8F6
Human-Readable Token
The 16-character alphanumeric code, printed alongside the 2D symbol. Manually verifiable at registrar.earth/verify.
Who uses registered pages
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Research laboratories
Lab notebooks with verifiable page provenance for patent filings, peer review, and regulatory compliance. Each page's timestamp and identity are independently auditable.
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Legal and notarial records
Chain-of-custody documentation where page authenticity and ordering must be provable. Checkpoint pages provide Merkle proofs for entire blocks.
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Field journals
Ecological surveys, geological field notes, archaeological dig records. Generate the notebook offline with a synced root, register page identifiers when you return to connectivity.
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Medical and clinical records
Patient observation logs, clinical trial notes, controlled substance records. The cryptographic chain ensures no pages can be inserted or removed after the fact.
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Art and provenance
Artist sketchbooks, edition records, and authentication certificates. Each page's identity is permanently resolvable through the SF128 global resolution fabric.
Notebook specifications
Page styles
Blank, dot grid, lined, or ruled. Configurable at generation time. All styles include the identifier footer and optional header seal.
Page sizes
US Letter (8.5 × 11″) and A4 (210 × 297mm). Print-ready PDF output with bleed marks.
Up to 1,000 pages
Each notebook supports up to 1,000 derived page identifiers from a single root. Multiple notebooks can share a root hierarchy.
Offline generation
Sync your root to a local device, generate notebooks offline with notebook-pack, then register identifiers when back online.
Start a registered notebook
Generate a print-ready notebook with verifiable page identifiers in under a minute.