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 0xcb1e9937ad7f59f64d37559b2c8397946425f8b8faaf7b88ffb9261e53e0f4f9. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a984be85-82f1-42d6-8a81-6fe35349d2d8.json and https://artists.proofprofile.net/proofs/artist/a984be85-82f1-42d6-8a81-6fe35349d2d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for 3 Trumpets, 2 Oboes, Timpani, Strings and Continuo in D: 1. Intrada
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 0x7a20951bcf3057e62b0439dbcfc3c19cc5bf96560098759fcfafa25463162615. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA508643001.
Concerto for 3 Trumpets, 2 Oboes, Timpani, Strings and Continuo in D: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066fbe2e2588eaf3b5fd6970c21157191b4ae9d6f5c9b7c494c2c0da8d4d4081. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLA508643003.
Concerto for 3 Trumpets, 2 Oboes, Timpani, Strings and Continuo in D: 4. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9466dae53ab76f4fe77619bf397bf0dcb3d9d9cfab1dbe8c2a8a4b58eda046. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA508643004.
Concerto for 3 Trumpets, 2 Oboes, Timpani, Strings and Continuo in D: 5. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adce4dc5b1e8e66ab4a6691c40ee5ede4b66912367eb2e2ff468633ceb9a7f7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLA508643005.
Academy of St Martin in the Fields: Baroque Landscapes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a20951bcf3057e62b0439dbcfc3c19cc5bf96560098759fcfafa25463162615. 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/NLA508643001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066fbe2e2588eaf3b5fd6970c21157191b4ae9d6f5c9b7c494c2c0da8d4d4081. 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/NLA508643003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9466dae53ab76f4fe77619bf397bf0dcb3d9d9cfab1dbe8c2a8a4b58eda046. 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/NLA508643004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adce4dc5b1e8e66ab4a6691c40ee5ede4b66912367eb2e2ff468633ceb9a7f7. 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/NLA508643005.
Concerto for 2 Oboes, Violin, Strings and Continuo in D, R.563 - Arr. 2 Trumpets: 2. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0233dc3b2db40e642d3285aa167cc8597f227d2958cba61bd76ad8259b3183c6. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NLA508214102.
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
Concerto for 2 Oboes, Violin, Strings and Continuo in D, R.563 - Arr. 2 Trumpets: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa78290623219e4797d64d267a16bb6c394769a87a1b8f31e3612a23821fffef. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NLA508214103.