HaloVaultStable card identity
One public Passport ID carries the TCG, publisher, card name, set, collector number, printing, variant, language, and catalog references.
Open Card Passports · Live framework
Your real cards.
Your real cards.
Their online proof.
Mint and authenticate a physical trading card once. Then let any TCG, tournament site, deck platform, or community app check that card through a free public API—without HaloVault running the match.
No game partnership is implied. Every platform chooses which cards, mint tiers, chains, and formats it accepts.
Open Card Passport
Charizard ex
HV-CARD-7A2F4D91C830
Mint record Valid
Authentication Store-Verified
Token binding Verified
Wallet controller Confirmed 2m ago
Example only. A token proves wallet control after a fresh signature challenge; it does not by itself prove legal ownership or present physical custody.
One neutral trust layer
The game stays the game. HaloVault supplies the proof.
A Card Passport is not a new TCG, a deck builder, or a game server. It is an interoperable identity and verification record for one real card.
Honest authentication
The API says whether the card was self documented or physically inspected by an authorized store—and exposes the underlying HaloCert.
Optional on-chain token
An external ERC-721 or other token can bind to the Passport. The mint record still works when no token exists, and HaloVault never requires NFC for online use.
Free verification
Any game can look up one Passport, resolve a HaloCert or chain asset, or batch-check a deck. Public reads need no API key and support browser CORS.
The truth model
Five facts. No magical “verified” shortcut.
Every layer answers a different question. Games can require exactly the evidence their format needs.
HaloCert mintDoes a tamper-evident record for this physical card exist, and does its hash chain still verify?
Store authenticationDid an approved verifier physically inspect, identify, and photograph the card at mint time?
Token bindingDoes the blockchain token's metadata resolve to this exact Card Passport commitment?
Wallet controlDid a chain RPC report this address, and can the player sign the game's fresh nonce with that wallet?
NFC / physical tagIs an optional physical lookup or tamper-resistant tag attached? It is useful in person, but not required online.
Game legalityIs this printing allowed in the format, and is the deck valid? Only the integrating game decides that.
From counter to match
How a real card becomes usable proof online.
Mint the card
The collector self-documents it or brings it to an authorized store for physical inspection and a Store-Verified mint.
Complete its Passport
Confirm the game namespace, set code, collector number, printing, language, and variant. A Passport ID is issued automatically with a card mint.
Attach a token if needed
Mint through any compatible provider using the Passport manifest as token metadata, record the chain asset, and verify the binding after confirmation.
Bring it to a game
The game reads the free API, challenges the player's wallet when token control is required, and applies its own card and deck rules.
Try the live registry
Check a Passport or HaloCert.
Enter a real HV-CARD-… Passport ID or HV-CERT-… certificate ID. The same API is available to every integration.
Public verification reveals only the public mint, card identity, token binding, and on-chain address facts—not private vault locations, costs, notes, or account data.
What an integration receives
Structured facts, not a yes/no guess.
| Response area | What it reports | What the game should do |
|---|---|---|
passport | Active, disputed, revoked, or retired; metadata hash and commitment. | Reject anything that is not active under the game's policy. |
card | Cross-TCG identity fields and external catalog identifiers. | Map the printing to the game's own card database. |
mint | Certificate ID, record hash, issuance time, and current integrity verdict. | Require mint.valid=true. |
authentication | Minted vs. Store-Verified, physical inspection, issuer, claim, and limits. | Choose the minimum tier for the event or queue. |
onchain | Every recorded token and whether its manifest binding was verified. | Use a verified binding when token gating matters. |
token_control | Last chain-confirmed address, chain, verification state, and check time. | Issue a fresh nonce and verify the player's wallet signature. |
Questions
What this does—and does not—mean.
Can a player use the physical card in any online TCG immediately?
The proof framework is live, but each game must choose to integrate it and decide which printings and evidence levels it accepts. HaloVault cannot make a third-party game accept a card.
Does the blockchain prove the player owns the physical card?
It proves token control only after a fresh wallet-signature challenge. A Store-Verified mint binds the physical card's inspected identity to its Passport; neither layer alone proves legal ownership or continuous custody.
Does this replace or change the original HaloCert mint?
No. The ordinary card mint keeps its existing certificate ID, snapshot, hash-chain record, evidence tier, and optional-NFC behavior. A Card Passport is an additional linked interoperability record. Existing card mints can be backfilled without reissuing or rewriting their HaloCerts, and non-card minting is untouched.
Is NFC required?
No. NFC is optional and primarily useful for in-person lookup, store handoff, and tamper-resistant physical tags. Online games use the Passport, public API, blockchain binding, and wallet challenge.
Does HaloVault hold the token or player wallet?
No. The player controls their wallet. HaloVault records the public chain reference and reads public chain state; it does not need a private key to verify token control.
Who determines whether the card is legal for play?
The game or tournament operator. HaloVault proves identity and trust facts; it does not maintain every game's format, ban list, deck limit, rotation, or match rules.
Build on the proof, not around it.
The open read API is free and does not require an API key. Start with one lookup, add a wallet challenge only if your experience needs token control, and keep every gameplay rule in your own system.
Read the complete integration guide