The King Club was a live music club in Madison, Wisconsin famous for showcasing some of the world's most famous rhythm and blues acts. It was one block from the Wisconsin State Capitol, at 114 King S
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 0xa5a966fd6d36cf73e39f84aa210fe772ef1e77fe9cbb26788e75f556e859284e. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ceb9ceee-9867-4fbd-9ad1-2a28275ff59a.json and https://artists.proofprofile.net/proofs/artist/ceb9ceee-9867-4fbd-9ad1-2a28275ff59a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).