thumb|A move in the game of Chomp, removing two blocks: a player has chosen a block to "eat", and must also eat the block below it. The top-left block is "poisoned" and whoever eats it loses the game.
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197a22ccef4a82d8dc7f0bddad1e23e9c10065af6248911a4df9fed712849cb3. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48878d1a-eac4-439b-ae86-d160c55e8ffb.json and https://artists.proofprofile.net/proofs/artist/48878d1a-eac4-439b-ae86-d160c55e8ffb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).