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 0x0306602e1a9f81a3752074965f4526dd72cccbd0238f250c8b046c1d524ffa29. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d36ead60-d2b4-49b1-b710-872b49595170.json and https://artists.proofprofile.net/proofs/artist/d36ead60-d2b4-49b1-b710-872b49595170.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Charakterklänge: Organ Music of the Renaissance
Manualiter: Barocke Kleinorgeln in Südtirol
Italiani e oltremontani: Historische Orgeln im Südtiroler Vinschgau
Lasst uns das Kindlein wiegen - Baroque Organ Music