In the English language, the term negro is a term historically used to refer to people of Black African heritage. The term negro means the color black in Spanish and Portuguese (from Latin niger), whe
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c72aeb184732522a0bba78ebb351880d2b60f8a4b28cca60d09bcfeb656a0cb. Chain 2 (Bitcoin): anchored in block 954046 (2026-06-17T04:53:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4150a1a8-44b8-4872-8834-7d371d2e91ad.json and https://artists.proofprofile.net/proofs/artist/4150a1a8-44b8-4872-8834-7d371d2e91ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).