DeMarco or Dimarcco is a name, originally meaning son of Marco. As a surname Ab DeMarco, Canadian ice hockey player Ab DeMarco Jr., American ice hockey player and Ab DeMarco's son Antonio DeMarco, M
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 0xcd29dcc9ffab21fe0583671e52ae796d630798a2ebde6554a6313822c10d487d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e27aea4-21b7-483c-87ab-d79f9e4c9031.json and https://artists.proofprofile.net/proofs/artist/6e27aea4-21b7-483c-87ab-d79f9e4c9031.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).