Verification Tools.

Cryptographic utilities, provenance calculators, and metadata inspectors. Note: All tools run locally in your browser. No data is transmitted to our servers.

1. Unanchored Asset Risk Calculator

Calculates the expected value loss of a physical asset relying solely on a paper LOA over time.

ASSUMPTIONS: LOAs are easily lost or degraded. Market data shows items missing primary LOAs suffer a 60-90% valuation penalty. Probability of loss compound annually.

Current Asset Value ($)

Holding Period (Years)

Annual LOA Loss/Damage Probability (%)

Penalty without LOA (%)

Risk-Adjusted Expected Value

Expected Loss due to Paper Risk

2. Local SHA-256 Metadata Anchor

Simulate the cryptographic hashing process for asset metadata before anchoring to the blockchain.

ASSUMPTIONS: Uses the Web Crypto API. Identical inputs will always produce the exact same 256-bit hash. Even a single character change alters the hash completely (avalanche effect).

Asset Metadata (JSON or Plaintext)

SHA-256 Output Hash (Hex)

3. Dynamic NFC URL Simulator

Demonstrates how NTAG 424 DNA tags generate unique URLs on every tap to prevent cloning.

ASSUMPTIONS: This is a deterministic simulation using a simple hash function. Real tags use hardware-secured AES-128 cryptographic keys to generate the CMAC.

Tap Counter:

Generated CMAC:

Resulting URL Broadcast:

https://verify.ac/tag?uid=&ctr=&c=

4. Base58 Payload Formatter

Format string metadata into Base58 (used widely in blockchain addressing to avoid ambiguous characters like 0/O/I/l).

ASSUMPTIONS: Pseudo-Base58 mapping used purely for interface demonstration without external cryptography libraries.

5. Block Finality Estimator

Calculate the approximate real-world time until a specific block height is reached.

ASSUMPTIONS: Assumes a steady Polygon L2 block time of ~2 seconds per block. Network congestion may cause variance.

Current Block

Target Block

Estimated time to finality:

6. On-chain Royalty Split Calculator

Simulate EIP-2981 standard secondary market payouts for creators.

ASSUMPTIONS: Excludes marketplace fees and gas costs. 100 basis points = 1%.

Secondary Sale Price (USD)

Creator Royalty (Basis Points: )

Creator Payout: $

Seller Net: $

7. IPFS Gateway Resolver

Convert native IPFS URIs into accessible HTTP gateway links to inspect high-res signature scans.

ASSUMPTIONS: Uses the public Cloudflare or Protocol Labs gateway.

Open in Gateway Gateway

8. Dead Address Validator

Check if a token has been correctly sent to a recognized null address indicating physical destruction.

ASSUMPTIONS: Recognizes standard zero-address and 0x...dead variants.

VALID BURN ADDRESS - TOKEN DESTROYED ACTIVE ADDRESS - TOKEN ALIVE

9. Transfer Fee Estimator

Calculate the fiat cost of transferring a Digital Twin on L1 Ethereum.

ASSUMPTIONS: Standard ERC-721 transfer requires ~65,000 gas.

Network Gas (Gwei)

ETH Price (USD)

Estimated Cost: $

10. Ink Topography Confidence Scorer

Demonstrates how the micro-topographical scanner determines a physical match based on depth points.

ASSUMPTIONS: AutographChain hardware requires a minimum 99.0% topographical point match to account for micro-abrasions over time while rejecting forgeries.

Original Hash Points

New Scan Matched

Comprehensive Site Navigation

This section guarantees 20+ valid internal links per page for crawler propagation.

Specific Query Answered

Q: Does an NFC tag guarantee the signature is real?

A: No technology can perform the initial expert human appraisal. The NFC tag guarantees that the physical object you are holding is the exact same object that a recognized expert previously appraised. It secures the provenance, preventing bait-and-switch tactics or fake Letters of Authenticity.

Data Table: Market Statistics

Statistic	Figure	Citation / Date
Forged Memorabilia Market Size	>$2.0 Billion	FBI Operation Bullpen Estimate
Online Vintage Autograph Forgery Rate	~50%	Industry Consensus (2023)
Value Drop Without Original LOA	60% - 90%	Auction House Aggregate (2024)

Next Natural Step

Try the Interactive Verification Tools