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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275070725f1500eacd8eecbad687149988f8f1b954d1aeb05df74b7ee1f244a9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/761ec531-2cf8-4e41-aa42-a77137dfcbd5.json and https://artists.proofprofile.net/proofs/artist/761ec531-2cf8-4e41-aa42-a77137dfcbd5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mendelssohn & Tchaikovsky: Violin Concertos
Violin Concerto No. 2 in E Minor, Op. 64, MWV O 14: I. Allegro molto appassionato
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ac8d01c7b6bfc803abc7d7fdbd1ec6cccb827ba50d69bc5dfce8a862fd2474. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HKI192421701.
Violin Concerto No. 2 in E Minor, Op. 64, MWV O 14: IIa. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bbd4f514f4c7c1560e3694a9f424d70c2ade8c846c71173418428146bb6725. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HKI192421702.
Orquestra Sinfônica do Estado de São Paulo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f7e7bf2642cc16b5ad7cfcebafa1e90648c060569db3ce953b49cbfac7e70b. 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/HKI192421705.
IIb. Allegretto non troppo - III. Allegro molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1922bce4b36a835bd564af8d3b44f3451c94130d289c1f4e09d3b82cbb2837cf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI192421703.