1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11699315b5638fdbc3dee294dbe540f799db8d2ea58c06343b3a4fdfc1086def. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19c2c8b7-ec59-4511-b133-0971e53ea2c6.json and https://artists.proofprofile.net/proofs/artist/19c2c8b7-ec59-4511-b133-0971e53ea2c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Marco Dall'Aquila: La Battaglia Music for Lute, Vol. 2
Bernardo non puol stare a due liuti No. 40-40A
Fantasia (Intabolatura di liuto de diversi autori, 1536)
Donne impresteme il vostro burato da buratare la mia farina