Che Sudaka is a four-piece band, composed of Argentines and Colombians living in Barcelona, Spain. The band defines itself as punk reggae party while using rhythms inspired by hip-hop and ska.lavozdeg
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 0x212a093120151f57b01ad5b120301f3f789e2f044112c7d0a7ea9d42dbe31010. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d32289e5-80ed-493e-b6a1-1420abc136a3.json and https://artists.proofprofile.net/proofs/artist/d32289e5-80ed-493e-b6a1-1420abc136a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).