thumb|Atz Kilcher photographed in Homer in January 2014 Attila Kuno "Atz" Kilcher (born September 2, 1947) is an American singer-songwriter and the oldest son of Yule F. Kilcher and Ruth Weber. He is
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 0xae4247e08f2ea7449745460f18a699d267d848b1d2482dfc8aec3565eb0fc84b. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f750b4d-f634-40b8-b8ab-c129d57ab93b.json and https://artists.proofprofile.net/proofs/artist/2f750b4d-f634-40b8-b8ab-c129d57ab93b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).