Marcão is an augmentative name meaning Elder Marcos or Elder Marco. Notable people known by this name include: Marcão Britto (born 1970), full name Marco Antônio Valentim Britto Júnior, guitarist o
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 0x96aaacbb3523905a9c709d56291a5ec008d600a8cd6c8a9a7a472a6034e90bf4. 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/4b1306c8-b7d6-41d4-8e9f-77b1fcafdf0b.json and https://artists.proofprofile.net/proofs/artist/4b1306c8-b7d6-41d4-8e9f-77b1fcafdf0b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).