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 0xd3d108bcf3efb2fde5bca41cbde126283fd1d31f69f6e7251b0edcf089edf6bc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11d14e2c-efac-45e4-a46f-b97c76121a36.json and https://artists.proofprofile.net/proofs/artist/11d14e2c-efac-45e4-a46f-b97c76121a36.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Bachiana II - Music by the Bach Family: Concertos
Concerto in E flat major for Viola and Fortepiano, 2 Horns, 2 Oboes, Strings and Basso continuo: 1. Allegro con brio
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 0x6208e64f8c507a0854861b7447f05edccf926659bd28323a255ca6f74d03e5b8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960200421 — a six-check JSON result.
Concerto in E flat major for Viola and Fortepiano, 2 Horns, 2 Oboes, Strings and Basso continuo: 2. Larghetto cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d244ee76760cbe3a868d571feb4e3b091c295d0f8facb7436ececfa34fc64b1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960200422 — a six-check JSON result.
Concerto in E flat major for Viola and Fortepiano, 2 Horns, 2 Oboes, Strings and Basso continuo: 3. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7698c0a8c3d40f55c7c72b30d238fd4cd41424ce763d8cc9990ce8371ca7f420. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960200423 — a six-check JSON result.
A Guided Tour of the Baroque Era, Vol. 8
Flute Sonata in E Minor, BWV 1034: I. Adagio ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dcbc87095a57219011e18dbba536bc039071940ff541deaccddf9d1af83766. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921242401 — a six-check JSON result.
Flute Sonata in E Minor, BWV 1034: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dac3c723e14fd4ebcf7e5502bf7c29c5690eda9981705bbec713474a87bc325. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921242402 — a six-check JSON result.
Flute Sonata in E Minor, BWV 1034: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e7daf71c2d70deb9bbc03798b14a5e4c52b6574595e8ce332116c20686a833. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921242403 — a six-check JSON result.
Flute Sonata in E Minor, BWV 1034: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaa955b40e2989ef8c5644c22ede682da33c2885c2f3a3dc7348080365b8bbe. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921242404 — a six-check JSON result.
Flute Sonata in A Major, BWV 1032: I. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc775758a09a32816aaaad503236b49b591562f4fcf52d58eb67d86a9f416fe48. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921242405 — a six-check JSON result.
Flute Sonata in A Major, BWV 1032: II. Largo e dolce
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3084485e74ef7ed425276f6c43c07dc8e82649f585d82cde8d676dcb6bc5b6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921242406 — a six-check JSON result.
Flute Sonata in A Major, BWV 1032: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935b33d1330e364fe1f542517a206c31697327771f86c17782be9619fada1af7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921242407 — a six-check JSON result.
Partita in A Minor, BWV 1013: I. Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3080692e2733458d1ede1fb314376d0d8f4ddb1a5c340164f1ef6177f878a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921242415 — a six-check JSON result.
Partita in A Minor, BWV 1013: II. Corrente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82053dab38925b29a4335b42d01c6bb940c73e34327947071fb7215d22a21d47. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921242416 — a six-check JSON result.
Partita in A Minor, BWV 1013: III. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3162fadd48d648c48e1863e9b41eb50344f1a36dc79d241f35f577d27664384. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921242417 — a six-check JSON result.
Partita in A Minor, BWV 1013: IV. Bouree anglaise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbbab341b2544d1885dadedbc414aad3511b2649754dd2e8390a52bc51db80e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921242418 — a six-check JSON result.
Quantz, J.J.: Flute Sonatas Nos. 272-277
Bach Bachianas: Music By The Bach Family
Cantata "Bekennen will ich seinen Namen" BWV 200 (After Stölzel): 1. Aria: "Bekennen will ich seinen Namen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe5ab7033bc043e1465879134dcb33634ff73ca8834eaad40a1dec05e41cc38. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960301790 — a six-check JSON result.