Mendonça () is a Portuguese and Galician surname of Basque origin. It sometimes appears as the anglicized forms Mendonca or Mendonsa. The Spanish variant is Mendoza. The name has been often linked wit
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 0x12867e1a48861c28f5a3ba74bf5fd71f2447a908d78dbb6e9e596c9e7b90296d. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5d2ecbd-15be-4b5c-b5bb-4e27a42bde99.json and https://artists.proofprofile.net/proofs/artist/b5d2ecbd-15be-4b5c-b5bb-4e27a42bde99.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).