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 0x3a64b26cf8abf2ad6bf94f095469c55ad1f0fc6b3e2d5a9e5e02a43b4c33194e. 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/fba559a7-c7ed-421a-8515-6030163aba3c.json and https://artists.proofprofile.net/proofs/artist/fba559a7-c7ed-421a-8515-6030163aba3c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arne, C.P.E. Bach & J.C. Bach: Harpsichord Concertos
Bach, JS: Brandenburg Concerto No. 3 in G Major, BWV 1048: I. —
Pachelbel: Canon - Albinoni: Adagio - Bach: Air on G String - Mozart: Eine kleine Nachtmusik - Fauré: Pavane - Handel: Hallelujah from the Messiah & Other Classical Hits
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 0x602b8febcb83b0a8037c2b44f3773a4dcfb47a6cfe28a8e7597df49d05927af3. 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/GBAYC8500657.
The History of Classical Music: The Best of the Baroque Period
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602b8febcb83b0a8037c2b44f3773a4dcfb47a6cfe28a8e7597df49d05927af3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAYC8500657.
Bach, JS: Brandenburg Concerto No. 1 in F Major, BWV 1046: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1340dbd0f11302e0f1fcdbd43770ca0170a8c937c1d58811f513c0e61f8cd184. 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/GBAYC8500650.
Bach, JS: Brandenburg Concerto No. 3 in G Major, BWV 1048: III. Allegro
Bach: Brandenburg Concertos - Orchestral Suites
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2c6290287336507d8193ec4702b2ea180c6dc8d03c86c7c091f46498de885e. 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/GBAYC8500659.
Bach, JS: Brandenburg Concerto No. 3 in G Major, BWV 1048: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056a53039e26aaff3b3e1aa221690f64103222628206c2deea6e1f9d38e903ef. 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/GBAYC8500658.
Bach, JS: Brandenburg Concerto No. 1 in F Major, BWV 1046: I. —
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddea1beb115e27b18cd73dfe38b2c6fa983728af79681cdb7012e91177f4bd85. 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/GBAYC8500648.
Bach, JS: Brandenburg Concerto No. 2 in F Major, BWV 1047: I. —
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39396176f0905c1958616524db46862350df01691efe56ff63402c62045d44df. 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/GBAYC8500653.
Bach, JS: Brandenburg Concerto No. 1 in F Major, BWV 1046: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdece687cb02e5d3042630341946249d25ad7585d23a9a58c9cfde05e83d4c057. 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/GBAYC8500649.
Concerto for Lute, 2 Violins and Continuo in D major, RV 93: 2. Largo (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a4c9c800fb22024c780af6b47f754123bd583f8cadb536b7413dd7cad22d4c. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBF078610792.
Bach, JS: Brandenburg Concerto No. 5 in D Major, BWV 1050: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64eaabe9958c664a866cdda5b6148072c1ea8cef0a4d31053d8d2173db997b1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:35:00Z), 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/GBAYC8500667.
Brandenburg Concerto No. 5 in D Major, BWV 1050: I. Allegro
Bach, J.S.: Brandenburg Concertos / Orchestral Suites / Violin Concertos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1927a605a39a345b1548922e3ac2d55c4688710ad493097ba69e35a584b2fb. 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/NLA507921513.
Brandenburg Concerto No. 5 in D Major, BWV 1050: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9574ea10f3b0ea0c422d3db98db3b9634caa8118ce4257fd9bc21480fdeb2a4f. 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/NLA507921515.
Bach: Magnificat - Vivaldi: Gloria - Handel: Water Music - Mozart: Toy Symphony & Laudate Dominum - Boccherini: Minuet - Rimsky-Korsakov: Flight of the Bumblebee & Other Classical Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39396176f0905c1958616524db46862350df01691efe56ff63402c62045d44df. 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/GBAYC8500653.
Concerto for Violin, Strings & Continuo No. 2 in E Major, BWV1042
Bach: The Violin Concertos, Brandenburg Concerto No. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecea9a725dbd7de1f740ff4e2cec8d5b87d131ec0760509cd17be1c09a25000d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USX761819905.
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
The Most Relaxing Vivaldi Album In The World... Ever!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa2b455a664de1573140f9536400ce6e33667f760ae5612ef98a8406801e904. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAYD0800360.
Concerto for Viola d'amore, Lute, Strings and Continuo in D minor, RV 540: 2. Largo (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ec9705566f6793ebf25879e53028aaacf37a2ce728c28d48fcf347e55061d8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078610802.
Sonata for Lute, Violin and Continuo, RV 82: 2. Larghetto (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f6ed74ae4aad54f3b7eadc2cb98e2d7253faf4d8807049149a4a0683a928f7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBF078610812.
Vivaldi: Flute Concerto in F Major, Op. 10 No. 1, RV 433 "La tempesta di mare": I. Allegro & II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfb9080076d61cd2a636ebbe587706555ffc1d547f77a67c653bb022b2804c5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBAYD1100077.