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 0xb5b96a40dcbe25badb129b5d89454da39917ce3407c261586bafa9ecd1cf6276. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84f562e1-7753-4ed1-a41e-8ddeadbde8b2.json and https://artists.proofprofile.net/proofs/artist/84f562e1-7753-4ed1-a41e-8ddeadbde8b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gluck: Paride ed Elena (Paris and Helen), Wq. 39
Mozart: Acis and Galatea, K. 566 (Sung in German)
Schmidt: Das Buch mit sieben Siegeln (The Book with Seven Seals)
Klavierkonzert Nr. 2, F-Dur, op. 102 - 2. Andante
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa5cc2e24063890a953842b1b4770d4d75b3328cf45238d57ad22aeab5241a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATRF71620503.
Schubert: Claudine von Villa Bella, D. 239, Fernando, D. 220 & Kantate zu Ehren von Josef Spendou, Op. 128, D. 472