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 0x464f6a1223c6ff3479a070a526ec0f12d5901beec71784ef026f0f98503e3926. 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/eb17a8e0-73c2-41a7-9fb9-7ed9fb4cebd7.json and https://artists.proofprofile.net/proofs/artist/eb17a8e0-73c2-41a7-9fb9-7ed9fb4cebd7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chaconne in G Major, HWV 435 (arr. E. d'Albert for piano)
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 0xaed2b8ab2ce7584c0a8ac0f016dd459b1d2bd37d0d3b5e6f20c170757680da5c. 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/DELE21612401.
Keyboard Suite No. 1 (Set II) in B-Flat Major, HWV 434: IV. Menuet (arr. W. Kempff for piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b241905f08e97382642b3bd5380038ffd96c2884f584ba0a6051a43d492e255. 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/DELE21612402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9ee9b12f334a8771c279ab615b5daeff5c4356f0b3bac89f12cfe72ad228bf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DELE21612403.
Sarabande und Chaconne aus dem Singspiel Almira von Händel, S. 181: Chaconne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479cf93143dd36acafb64f1e11d639df6905b2aa5042648f126489ca2223d543. 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/DELE21612404.
Rinaldo, HWV 7, Act II: Lascia ch'io pianga (arr. M. Moszkowsky for piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23a9638c97fdfb7e291c055afaa370d133d2b057eb39f3814307b93818f7aa6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DELE21612405.
Orchestral Suite No. 3 in D Major, BWV 1068: II. Air, "Air on a G String" (arr. A. Solti for piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54af158ecc20887c86b1c2aaa909e1d8cdfc43a6c1e91999b0133db0877a77d2. 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/DELE21612406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b225ec33a8ccb907d1f2763dd476fb00dffdfda2b6e95fca416533ff13fdf6. 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/DELE21612407.
Toccata & Fugue in D Minor, BWV 565 (Transc. I. Friedman): Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106387e8d656827cb28dfca97ec80f8370e86b3a5efc7d0fc84447b41249e744. 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/DELE21612408.
Cello Suite No. 2 in D Minor, BWV 1008 (Transc. L. Godowsky): I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78495b3b081c84b14706e8be563c9d9b6483fa9d991413c81f854aee0daa706c. 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/DELE21612409.
Cello Suite No. 2 in D Minor, BWV 1008 (Transc. L. Godowsky): III. Courante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8236d822da1928fefee0db2a490b0e94aa03041abc4c4b4c6a073de8b6864b. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:28:10Z), 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/DELE21612411.
Cello Suite No. 2 in D Minor, BWV 1008 (Transc. L. Godowsky): VI. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f8fd53f42e66f0189dff94fa46db305b911d96ff4a478aedc1174bb7159aea. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DELE21612414.
Violin Partita No. 2 in D Minor, BWV 1004: V. Chaconne (arr. F. Busoni for piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b67ab45fe90ad5ed18a24daf713b70670e3181db8e6c59c77f0e71ff4f8b2bb. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DELE21612415.
Rinaldo, HWV 7: Lascia ch'io pianga (Transc. M. Moszkowski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23a9638c97fdfb7e291c055afaa370d133d2b057eb39f3814307b93818f7aa6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DELE21612405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106387e8d656827cb28dfca97ec80f8370e86b3a5efc7d0fc84447b41249e744. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DELE21612408.