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 0x5575abe787191efea78dfec96e440b54204e331d1d668a09c78867078acb07d8. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3245ba3-b69e-41f9-b570-d7b9ac6eb0bb.json and https://artists.proofprofile.net/proofs/artist/b3245ba3-b69e-41f9-b570-d7b9ac6eb0bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rolla/Vivaldi: Concertos for Viola & Viola d'amore
Concerto grosso in F minor, Op. 1, No. 8 "Christmas Concerto": 1. 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 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 0xae2c6039ba686a79ad0126542482de55aaa633ab179dc40622fc99e7f7427df5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLA508435712.
Concerto grosso in F minor, Op. 1, No. 8 "Christmas Concerto": 2. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9003790d1f4b29e9d63fcc563afb2299f75593887eb1c1a55da941e719315e1d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLA508435713.
Concerto grosso in F minor, Op. 1, No. 8 "Christmas Concerto": 3. Vivace - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89c7facda53c0e409188d19380d378596659a076e0080714da12d4d3eee6301. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLA508435714.
Concerto grosso in F minor, Op. 1, No. 8 "Christmas Concerto": 4. Grave - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5cb0c35acd222697b064bac8c7844a1f50a8d471ed2076e78519fa7f0f2570. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLA508435715.
Concerto grosso in F minor, Op. 1, No. 8 "Christmas Concerto": 5. Largo andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cffb2c8704a0f0e74218ec9b067b91fdaf3f0516e54440153b5b8b32b97e055. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLA508435716.
Concerto grosso in F minor, Op. 1, No. 8 "Christmas Concerto": 6. Andante - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09db61e65ec7e03c32ea481badcc00078bf472f9f4791fcf790552818ec20b4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLA508435717.
Concerto Grosso In F Minor, Op. 1, No. 8 "Christmas Concerto": 7. Pastorale (Largo andante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c7b6d07d4a23668d2b1325cb73d56e6215e301e15e3b60d3e281032e10ada3. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLA508435718.
Messiah - arranged by Christopher Dobrian / Massimo Paris: Hallelujah
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e87fd3ec1d246cb95a2b2e1f5d8234caaa6293f5795637bf0cf1139766ed55b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEN961100820.
Viola d'amore Concerto in D minor, RV 394: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59ec3af811622d758f739a6f06ec25870898f4450479bbd53fc37dd1fa232f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLA508532508.