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 0x2ef2599e9ab290a60c0e5c12056644a7c18a0c93ce61c63c3d444b9b2a3922ff. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6d0c8ce-1479-4703-9df1-3f9b89b6fa9c.json and https://artists.proofprofile.net/proofs/artist/e6d0c8ce-1479-4703-9df1-3f9b89b6fa9c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Haydn: Piano Trio in G Major, Hob. XV:25 "Gypsy Rondo": III. Rondo all'Ongarese. Presto (Arr. Farrington for Recorder, Violin, Cello & Harpsichord)
Piano Trio in G Major, Hob. XV:25 "Gypsy Rondo": III. Rondo all'ongarese. Presto (Arr. Farrington for Recorder, Violin, Cello & Harpsichord)
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 0xfcd75b8229afb0f37125aafea2445ac32e1169556b1a0743e718d9e8ae646795. 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/GBBBC2400561.
Telemann: Trio Sonata in A Minor, TWV 42:a4: I. Largo
Trio Sonata for Recorder and Violin in A Minor, TWV 42:a4: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283c66703d12cd504f35b903a56ccb675c9c1f2d741a538a6bad2e5c2b7c0d90. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBBBC2400565.
J.S. Bach: Orchestral Suite No. 3 in D Major, BWV 1068: II. Air (Performed on Recorder)
Orchestral Suite No. 3 in D Major, BWV 1068: II. Air - Performed on Recorder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32ebed7e4e3ef3f2acab1a6b8dc35b71e80f80f7b43758335da264686b0e108. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBBBC2400560.
Piano Trio in G Major, Hob. XV:25 "Gypsy Rondo": III. Rondo all'Ongarese. Presto (Arr. Farrington for Recorder, Violin, Cello & Harpsichord)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd75b8229afb0f37125aafea2445ac32e1169556b1a0743e718d9e8ae646795. 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/GBBBC2400561.
Orchestral Suite No. 3 in D Major, BWV 1068: II. Air (Performed on Recorder)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32ebed7e4e3ef3f2acab1a6b8dc35b71e80f80f7b43758335da264686b0e108. 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/GBBBC2400560.
Trio Sonata in A Minor, TWV 42:a4: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283c66703d12cd504f35b903a56ccb675c9c1f2d741a538a6bad2e5c2b7c0d90. 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/GBBBC2400565.
Trio Sonata in A Minor, TWV 42:a4: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ad2d03882414cf6d1e2d914eec2be21effd569021fad6b49f016e4c7b13e60. 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/GBBBC2400566.
Concert royaux, Quatrième concert in E Minor: V. Sarabande. Très tendrement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf030922f768b20ce424c03bb6bd4214ac20342db11b1e947829f397b3c5f0831. 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/GBBBC2400574.
Concert royaux, Quatrième concert in E Minor: VI. Rigaudon. Légèrement, et marqué
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab68d43e130ee8b5b583f5445dd1ff7c820bcb35db762f05e3f8b3b6cbcdc435. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBBBC2400575.
Concert royaux, Quatrième concert in E Minor: VII. Forlane en rondeau. Gaiement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a1f4b7c7878c3f3db1069b8a8bc1424a95a4f49f6ac282633e66e3c8ed454b. 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/GBBBC2400576.
Il pastor fido, Sonata No. 6 in G Minor (Formerly Attrib. Vivaldi as RV 58): IV. Allegro ma non presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7235ceccef85a820d85edc8a5fa7c03c68abb7d053d4c86ba9772255ca3e17f9. 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/GBBBC2400563.
Recorder Sonata in F Major, Op. 1/11, HWV 369: I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986e2fc1803ab25a037c7f3d53afecacd5ac48c003208d6f5c9463d2cae08e67. 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/GBBBC2400572.
Recorder Sonata in F Major, Op. 1/11, HWV 369: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a7440d39d12ad64de3a1fc1318610ec2effaf68f9a3bef190ab98e4d6e0096. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GBBBC2400573.