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 0x1d9168d4eed3c72e9422478ab6b23fde1dc160ecc36c1f73a62431fbc52123f6. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c89557d7-99d9-4f05-9e61-6ee40fb2bd5a.json and https://artists.proofprofile.net/proofs/artist/c89557d7-99d9-4f05-9e61-6ee40fb2bd5a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Horn Recital: Allegrini, Alessio - Cherubini, L. / Graun, J.G. / Kohl, W.L. / Haydn, F.J. / Mozart, W.A. / Rossini, G.
Horn Recital: Allegrini, Alessio - Cherubini, L. / Graun, J.G. / Kohl, W.L. / Haydn, J. / Mozart, W.A. / Rossini, G.
Rossini: Andante e tema con variazioni in E-Flat Major
Orchestra dell'Accademia Nazionale di Santa Cecilia
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 0xefe3ef21b87c0a7b8f18a407ac6c00704b89b50977e3375e60cb9d2269ad4902. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAYC1402211.
Sinfonia concertante in E-Flat Major, K. 297b: III. Andantino con variazioni
Mozart: Sinfonia concertante in E-flat major, K. 297b
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12bd57fa7f7ea1dd4d0eb2ddfeffb65125434fae1c057f68f657363ab860862. 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/ITD542001282.
Sinfonia concertante for Oboe, Clarinet, Horn and Bassoon in E-Flat Major, K. 297b (Attrib. Doubtful): I. Allegro - Live
Mozart - Sinfonia Concertante For Winds; Flute & Harp Concerto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bc2d27ea802935a773531888f51ef85722b43c1a822b02c6b48a0b9ea4dc65. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEN960803351.
Sinfonia concertante in E-Flat Major, K. 297b: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c17d14286957bcbce1a6a6dca5f6bdb339d7a385ffb075db233246a551dc196. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ITD542001280.
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
Sinfonia concertante in E-Flat Major, K. 297b: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c64e0a506a5ee5312f08b4c789aeb30be550d02e9ce9249d410f310f1f5a987. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITD542001281.
Sinfonia concertante for Oboe, Clarinet, Horn and Bassoon in E-Flat Major, K. 297b (Attrib. Doubtful): II. Adagio - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eca7d49b2dd66d37c95b45a61dd4823d9da7dffae936f8722b5f7e482bf5c3a. 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/DEN960803352.
Sinfonia concertante for Oboe, Clarinet, Horn and Bassoon in E-Flat Major, K. 297b (Attrib. Doubtful): III. Andantino con variazione - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b7ef5fc2cb3b45e0f87e20c8d10c3e95df1dfe1e3de8bd5c6fe3d77ff9b452. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/DEN960803353.