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 0x4ced80516969f5d2ab31c962a3861d663f9b78d01ee0307eb2d986f58d97072e. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01451d9d-91a6-46e7-8788-2bdcb1023781.json and https://artists.proofprofile.net/proofs/artist/01451d9d-91a6-46e7-8788-2bdcb1023781.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wolfgang Amadeus Mozart, Symphony No. 39 In E Flat, K. 543
Ludwig van Beethoven, Symphony No. 7 In A, Op. 92
Concerto for Trumpet and Orchestra in D Minor, Op. 9, No. 2: I. Allegro e non presto
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 0xcce315fd47a8eb3e818ab39cd930c69e77eb8b1c138c2e4955ba83301c2706a4. 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/QM4TX1788104.
Concerto for Trumpet and Orchestra in D Minor, Op. 9, No. 2: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14133eb10c0aeb389fc0c00824023848bf4774123fc53cdc71bc31075c52e43b. 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/QM4TX1788106.
Bach: Toccata et fugue in D Minor, BWV 565 (Avec les sons de la nature Version)
Verdi - Respighi - Puccini & Rossini: Opere per Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cfd4f0334950853ad05e7b154e21ec10a4d2928c2eb2c6be5685203e089dab. 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/FR6V80748369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d55774028a119a4dd0464cfa8773318653c2b6f86af3907de8472de82e540df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR6V80748370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969a59e14825934e297048586d8fd5009c59ae6dc8d26abec6d380a6f229d59f. 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/FR6V80748371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4fadcb94bdfafc25d98dcee6e7f703fb993104d45de7ccb54c4ba3d0b831cd. 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/FR6V80748373.
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
Johann Sebastian Bach, Cantata No. 140 "Wachet Auf", BWV 140 (Sleepers Awake)
Cantata No. 140 "Wachet Auf", BWV 140 (Sleepers awake) - Zion hort die Wachter singen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37513a7ccf4cdfef5d4b17c90d72085d1bd2c90ab8fa1f56c759eec1cc563c03. 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/KYCC20001445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0696a40eb67e473740e8ddbabaace3f48d5f70eed77e6c3ba79215f99166e643. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRDUM9900008.
Beethoven: La lettre à Élise, WoO 59 (Orgue dans la nature Version)
Bach: Toccata et fugue in D Minor, BWV 565
Bach: Toccata et fugue in D Minor, BWV 565 (Sur les rives de la mer Version)
Bach: Toccata et fugue in D Minor, BWV 565 (Dans la forêt pluviale Version)
Bach: Toccata et fugue in D Minor, BWV 565 (Au coin du feu Version)
Bach: Toccata et Fugue in D Minor, BWV 565 (Dans le vent Version)
Bach: Toccata et Fugue in D Minor, BWV 565 (Dans la tempête de pluie Version)
Johannes Brahmes : Symphonie No. 4, Ouverture tragique
Brandenburg Concerto No. 2 in F Major, BWV 1047: I. [Allegro]
Bach, J.S.: Brandenburg Concertos / Orchestral Suites / Violin Concertos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f1a57c88cad8c9232fed134ddaf1379f4bb3f71eb21fc20a43b752910f0754. 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/NLA507921505.
Brandenburg Concerto No. 2 in F Major, BWV 1047: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43754f0d63c7a6cce803fed099134449ef130156367407dafe1501b113cc83e9. 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/NLA507921507.