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 0x40daa4760e51da9b71b3cda969b135d3ba1bf014ca0f8591f326bb75b8ab3897. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94238dae-8ea1-4dbb-bdb5-0f8e1df17a69.json and https://artists.proofprofile.net/proofs/artist/94238dae-8ea1-4dbb-bdb5-0f8e1df17a69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trio Sonata in C Major, BuxWV 256: I. Vivace
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 0x7f84a23660835a6058c1a5a13c2681189813095a3bd48b70d726ab2bf34ce0b0. 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/SEVAF2300501.
Trio Sonata in C Major, BuxWV 256: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb633fd219b6c8c25dce2473ec9361d96d5659353e03fc03ffb1cdabed2a91e. 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/SEVAF2300502.
Trio Sonata in C Major, BuxWV 256: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10d9cc926dcd96e8e5f37127f839b905c000ba85a8a93d894e31c0c37ec7ae4. 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/SEVAF2300503.
Trio Sonata in C Major, BuxWV 256: V. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfca9abedb77bb242e19bed6e786a96397fd31a683ecf6352f984b01a4aeba68. 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/SEVAF2300505.
Trio Sonata in A Minor, BuxWV 254: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5511403bf055a8c2ef75b25ee824e3a6205e31d12082c7ff39283a71678124b6. 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/SEVAF2300506.
Trio Sonata in A Minor, BuxWV 254: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cc88fc8937f4d2596758d32c643212d42bfc0562fd1bce762289213e1be314. 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/SEVAF2300507.
Trio Sonata in A Minor, BuxWV 254: VI. Presto - VII. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c27259b2aacca380c4ba7711fa1e39b2f5680d6633a0b25b42c401a3107bcd. 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/SEVAF2300510.
Trio Sonata in D Major, BuxWV 260: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d203b5313d6f96fd537acda68bea4e940c9d375d60f4414b057617985e158f. 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/SEVAF2300514.
Trio Sonata in D Major, BuxWV 260: V. Largo - VI. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bdbdfa390a03fb2488abea0acaa7f17085887ffd3c6118f60ef88443ae64ae. 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/SEVAF2300516.
Trio Sonata in C Minor, BuxWV 262: IV. Allegro - V. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8e69d525f56312337a036543b1b2cd96922d65f94183805307c03c9f30349e. 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/SEVAF2300520.
Trio Sonata in C Major, BuxWV 256: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac19f0dde16db54636971b7762181a9d970f4502c5ea185c6b2de763341ddfe6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SEVAF2300504.
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
Trio Sonata in A Minor, BuxWV 254: III. Lento - IV. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc567b91a96d5b8f80f8a636cd57451f5f3f33a341181d2b06d3402e9c518939. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/SEVAF2300508.
Trio Sonata in A Minor, BuxWV 254: V. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fe8c244a05cb059cb6c40d9c392fa6d774128fde03e9d1a9d774d67f83a6ad. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SEVAF2300509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad33989a9f96ce6803fd735fa860cc7c07252f2955ba68217e36c19f67aebfe. 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/SEVAF2300511.
Trio Sonata in D Major, BuxWV 260: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a73a4dceae8a89831c622ae6c969d1e2bc76ece9430b1991d522320c7f7c1fc. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/SEVAF2300513.
Trio Sonata in D Major, BuxWV 260: IV. Arietta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d83877ccd1d362f906f8deb3a3187e9dcb54a845634e6f5285542bcfddcffd0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SEVAF2300515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4655118bacf1761c5bd74253fa531e9f0e5df1a31f79163e61736c49b8adbd1a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVAF2300517.
Trio Sonata in C Minor, BuxWV 262: I. Poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6e600b92f94b253e7d62307c1905e69c0ec6830806afc26e38859f16b22144. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/SEVAF2300518.
Trio Sonata in C Minor, BuxWV 262: II. Allegro - III. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c60eac3894e349eb643a0dc25096e1ea59638559f6e75c89983144eec650450. 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/SEVAF2300519.