A Banca (Portuguese for "The Stand") was a very short-lived Brazilian alternative rock band from Santos, São Paulo, composed mostly by former Charlie Brown Jr. members and described as a "spiritual su
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 0x225bacc6b2c20fdf166a13eda1b27624ec3ace6447783efa74341f8f1ef024f7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a5d1424-3d93-4822-bf5a-754fccdc382e.json and https://artists.proofprofile.net/proofs/artist/9a5d1424-3d93-4822-bf5a-754fccdc382e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).