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 0x48068d8f44dd2700e94636abcb59ddd41da19ddb92d71b3c7bdf9ac5ebb008a6. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/766405fc-a7c9-4f4a-ada8-5bc0a4c6ab76.json and https://artists.proofprofile.net/proofs/artist/766405fc-a7c9-4f4a-ada8-5bc0a4c6ab76.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Blue Edition - Mozart: Sechs Ländlerische Tänze, K. 606 & Piano Concertos Nos. 1, 2
Grey Edition - Mozart: Symphonies Nos. 54, 40 & Bassoon Concerto, K. 191
Blue Edition - Mozart: Horn Concerto No. 1, K. 412 & Piano Concerto No. 23, K. 488
Green Edition - Mozart: Sechs Ländlerische Tänze, K. 606 & Divertimento No. 7, K. 205
Blue Edition - Mozart: Sechs Ländlerische Tänze, K. 606 & Piano Concerto No. 22, K. 482
Green Edition - Mozart: Bassoon Concerto, K. 191 & Piano Concerto No. 9 "Jeunehomme"
Orange Edition - Mozart: Sechs Ländlerische Tänze, K. 606 & Symphony No. 40, K. 550
Red Edition - Mozart: Symphony No. 54, K. Anh. 216 & Bassoon Concerto, K. 191
Red Edition - Mozart: Symphony No. 18, K. 130 & Symphony No. 54, K. Anh. 216
Yellow Edition - Mozart: German Dances Nos. 1 & 2
Green Edition - Mozart: Symphony No. 54, K. Anh. 216
Classical Selection - Mozart: Symphony No. 18, K. 130
Blue Edition - Mozart: Symphony No. 54 in B-Flat Major
Mozart: Symphonies Nos. 19 & 24 - 2 Divertimentos, K. 136 & 137
Mozart: German Dances, Minuets & Symphony No. 1
Tchaikovsky: Symphony No. 4 & Capriccio Italien
Concerto in G Major for Viola and Orchestra, TWV 51:G9: I. Largo
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 0x6ed0e377e7890cc4c4b9cbbc47f5a6488eb7e65616fb15d75b4e718d63006b86. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEWDL0710604.