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 0xaa9e065c06e725ae9e9b3db057e4095d45f44f7f11ff5d7a4310d73abfa87a1a. 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/90e53b4e-40b1-4240-9a8b-d76d80000b8a.json and https://artists.proofprofile.net/proofs/artist/90e53b4e-40b1-4240-9a8b-d76d80000b8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin Concerto No. 2 in E Major, BWV 1042: I. Allegro
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 0x71f370f4f30ec9a08d7a132d6b9d20befd185ad52343e6f7c7c62922899d4de4. 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/GBF071301611.
Violin Concerto No. 2 in E Major, BWV 1042: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcb17e84f2b696d5d4f97f74fb4c71aba5aacf70e22f5b86a1290a50928d437. 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/GBF071301612.
Violin Concerto No. 2 in E Major, BWV 1042: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eec0795ea29accb20115160d580b2535c2fc831e326c170dc06f59b21c1ae40. 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/GBF071301613.
Violin Concerto No. 1 in A Minor, BWV 1041: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223137c1157febf9f3e98c0db43b0749d3f4e01bc2f3921af76607f27c9e62d7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF071301622.
Violin Concerto No. 1 in A Minor, BWV 1041: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381f0ec80fd08357d7e6acfa6e149e2fcf618ecec9b94cbcb474e6d00e09af35. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071301623.
Concerto for Violin and Oboe in C Minor, BWV 1060R: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fcaa8432e6443cd5e0e4becf73c1aa470621ab85ff72469d0e6c417f17b842. 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/GBF071301601.
Concerto for Violin and Oboe in C Minor, BWV 1060R: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06eceb7afb48fa403a32905743e6e0251ead01054a4fea9c0a5ed81807a537e. 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/GBF071301603.
Violin Sonata No. 3 in E Major, BWV 1016: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023f205346b187cb006d63ba54dbfc001a52451caf5bb6f2fe4eda6a9f91af56. 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/GBF071301631.
Violin Sonata No. 3 in E Major, BWV 1016: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633413028b1e383ace45360fc557b65266c44de558753c86e1e3a5ec76664583. 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/GBF071301632.
Violin Sonata No. 3 in E Major, BWV 1016: III. Adagio ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82e9060fbc72e8c8828e674a17ac6f545b75f80839bae9ff2e58eeed0af698b. 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/GBF071301633.
Violin Sonata No. 3 in E Major, BWV 1016: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a36b126e02cb05a217e988b7f24b20d7f861254f65875576619e376d4f1897b. 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/GBF071301634.
Violin Sonata No. 4 in C Minor, BWV 1017: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bef7aaf95430cb654779172440651a140b82bcaaad61adf4912df16e1e54d59. 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/GBF071301641.
Violin Sonata No. 4 in C Minor, BWV 1017: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d86e9d27b5b21ec29e1a858478b67e6c7ce04347716eb0ab1a8dd014d80550b. 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/GBF071301642.
Violin Sonata No. 4 in C Minor, BWV 1017: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9f9a5d96ad848ec7537c51f39ba1eb4b933fdab7b6f49acb6b1d47d073a7a8. 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/GBF071301643.
Violin Sonata No. 4 in C Minor, BWV 1017: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2147c638f6b8f75fd909dddfc6c38f8017178f8d7d41143ecb06f733726d84. 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/GBF071301644.
Harlem Nocturne for Bassoon, Double Bass, Hammond Organ and Drums (arr. Marijn van Prooijen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2632aa7d10a8c5290c3e97ae08149ab9450acdcf1bc2e0da5d76d0220d595fb0. 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/NLY331208427.
Das Wohltemperierte Klavier: Book 1, BWV 846-869: Prelude in E major BWV 854
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38ed12b831d71dc730a41c5dce12832d8fd6eae50490877a99b0a8d49f43575. 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/GBBBA0540517.
Sonata For Viola Da Gamba And Harpsichord No. 2 In D, BWV 1028: 1. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306bd802131461f8b95e3bec6b863a819ac2931d2eeced1908f432e2483e7173. 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/GBF078611131.
Orchestral Suite No. 3 in D, BWV 1068: 2. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150f25c9efdf82079728d88f422a2b2b165bb25e237b6aa45ab2c09fd82ba585. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF071301660.
Das Wohltemperierte Klavier: Book 1, BWV 846-869: Prelude in C Major, BWV 846
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483f6c562af628f3d34c2027c341a0a326e904592514baa8d52de66cbe73bfa8. 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/GBBBA8470201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcb17e84f2b696d5d4f97f74fb4c71aba5aacf70e22f5b86a1290a50928d437. 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/GBF071301612.
Ich ruf zu dir, Herr Jesu Christ, BWV 639 (Arr. Busoni for Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf58f32dea46a158d69a9197e1a6d92b7441f9279c91d970d72d2e9eb475fc00. 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/GBBBB5300008.
Cantata No. 156, BWV 156 "Ich steh mit einem Fuß im Grabe": Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9926100be08105745632ddaa83f4b970d0a8e89ec09fbb3876905106a746c5. 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/GBBBA1100570.
Prelude and Fugue in E (WTK, Book I, No. 9), BWV 854: Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7e09712d017912edcde09c41e91ae87a5c917cac1a223cf6adf112279f46ed. 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/DES381509017.
Prelude and Fugue in A flat (WTK, Book I, No. 17), BWV 862: Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8ea0d89dc7fe9893eca327cbad9021e988d4eccf7f185571c36111d972e361. 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/DES381509033.
Concerto for Keyboard, Strings, and Basso continuo No. 5 in F minor, BWV 1056: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51224b87383b70ac8057c96d85fa1640da54472210f480191b6df0e3d0d6a558. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITUM71003480.
Concerto for Violin and Oboe in C Minor, BWV 1060R: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c747d4057c20875804f5db5c32867da0e15becb3b8909907a9061b29ba023d. 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/GBBBA0800622.
Cantata No. 196, BWV 196 "Der Herr denket an uns": Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d7de865af807051f7d93c00d7aa87ccafb1f647e93d8ae56f9a82e6c2050cf. 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/GBBBA1100590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda411550e3ab0e161997c812cbe6471ece928881babbfe607c5e2e6c0ec9fd2e. 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/GBF075910911.
Partita No. 1 in B-Flat Major, BWV 825: IV. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791e9634a51b13b854138d5ab5d2f2093d79cb07295f06bf0cad6b0e3c7566d8. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:03:24Z), 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/GBF078331304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306bd802131461f8b95e3bec6b863a819ac2931d2eeced1908f432e2483e7173. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBF078611131.
North Sea - Nature Untamed (Feature Film & TV Series Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05af708640a8f799185dfd90f38d81b01218a534dab91f4927b9691bbdea21d4. 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/NLRD51400591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9675849a340b6dd1f45475eac5d4c7402f7e42556ab16ea9aff8b81b78770aa6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:45Z), 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/DKHJ62401104.