Head Control System is a cross-national rock/metal band featuring portuguese Daniel Cardoso (ex-Anathema, ex-Sirius and ex-Re:aktor) and Norwegian Kristoffer Rygg (of Ulver and ex-Arcturus and ex-Bork
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 0xfe024c452ce92a6cfbeac3bcd614c9008e2ea731b97afc95124338602eb1dca6. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd294f55-45b7-4608-a75f-100b4ef6609e.json and https://artists.proofprofile.net/proofs/artist/bd294f55-45b7-4608-a75f-100b4ef6609e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).