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 0x265012347722377093d83071ebc8c3cd4c3b575cf3b9b53664b938fb177e2eb7. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f996399a-3f01-41ec-8a1f-2f4550d4a101.json and https://artists.proofprofile.net/proofs/artist/f996399a-3f01-41ec-8a1f-2f4550d4a101.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stockhausen: Tierkreis - Ars Nova & Ars Subtilior / 12 X 12 - A Musical Zodiac (VRT Muziek Edition)