Carlos Cabral may refer to: Cabralzinho (footballer) (Carlos Roberto Cabral), Brazilian football player and manager Carlos Cabral Jr., songwriter, producer, and arranger Carlos Cabral (athlete), P
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 0x41a1dfb5959fb936c6c5923b14fce0781cfee84b04f23b155a390f2d21d0614b. 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/5b4e064d-2609-4fb6-860b-a5c65777d926.json and https://artists.proofprofile.net/proofs/artist/5b4e064d-2609-4fb6-860b-a5c65777d926.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).