Banda do Mar is a Brazilian band announced in May 2014 by Marcelo Camelo (vocals/guitar), his wife Mallu Magalhães (vocals/guitar) and Fred Ferreira (drums). The name of the band is Portuguese for "B
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 0xe31b3716dcbf3c16a265782c76912682412a89e6ca9ba7b63dfb33d4f0e629f6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f13b1748-f162-4bff-b5a5-960b749e542f.json and https://artists.proofprofile.net/proofs/artist/f13b1748-f162-4bff-b5a5-960b749e542f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).