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 0xd74b0970e845873cbc301dc4835498a6dc1690d7386a4b6b4626c2594208df06. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/586eb6df-b5fe-4c09-8b1d-147d2ebb2399.json and https://artists.proofprofile.net/proofs/artist/586eb6df-b5fe-4c09-8b1d-147d2ebb2399.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Overture (Suite) No. 3 in D Major, Bwv 1068: Ii. Air
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 0x0382242ac8182259c2398d357dab3278520f46cf8576c8bc4bda5aefa7c5f8dd. 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/HKI199911316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35edb3f1b4ae94b5582455b7b14e5f6b5c9dff0dede0065882612849f0bb0ddb. 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/HKI190423201.
The Well-tempered Clavier, Book 1, Bwv 846-869: Prelude and Fugue No. 1 in C Major, Bwv 846
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5896afda42888f596b9a9417d7ed80caf86c25d2185946fccf4975bba5754f9. 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/HKI199627001.
Violin Sonata No. 3 in C Major, Bwv 1005: Iii. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d21f732470101b03b9cb0e3c033861c3c9a5f7cec42bb8a7571b07a882267e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI190782208.
Brandenburg Concerto No. 1 in F Major, Bwv 1046 (arr. E. Bindman for piano 4 hands): Ii. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5533de783a7b532bf8df2f7f4108d4c7524bc4dcf666b26bc21ee8a0ba9fbc50. 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/HKI191730402.
Concerto for 2 Violins in D Minor, Bwv 1043: Ii. Largo ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5cb6f9704da25241f51e19768e8de39c7cb9b3d6bf2a4a2dc2824ad292befa. 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/HKI199207108.
Cello Suite No. 1 in G Major, Bwv 1007: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74d69aa25b7dfef36059cb37cba6eed97e66028d717ed6fef111ad2360517bb. 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/HKI190446501.
Mass No. 13 in C Major, K. 262 "Missa longa": I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b3eb982c9fa8e7fe00718cf6b51b79cbf2b91d5891a7f10b2227a9859f401e. 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/HKI192045701.
Overture (Suite) No. 3 in D Major, BWV 1068: Suite No. 3 in D Major, BWV 1068: Air, "Air on a G String"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0382242ac8182259c2398d357dab3278520f46cf8576c8bc4bda5aefa7c5f8dd. 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/HKI199911316.
Orchestral Suite No. 2 in B Minor, BWV 1067: VII. Badinerie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff6a67be4582ac7c93f9ba9b6ad7d1351706e8c945dd95aa67a75894177a868. 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/HKI199911314.
Brandenburg Concerto No. 2 in F Major, BWV 1047: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d4e6ccb8ba4fc44cc73fc1967a26c1223a73a3b3f8353d9986bea23e60f75e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKI199911106.
Piano Concerto No. 21 in C Major, K. 467 "Elvira Madigan": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10af01334a77e5ec7c5ba560eaef111dbba78b6a61dcb85281c1657ad6390803. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/SEWDL0731005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0382242ac8182259c2398d357dab3278520f46cf8576c8bc4bda5aefa7c5f8dd. 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/HKI199911316.
Brandenburg Concerto No. 3 in G Major, BWV 1048: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f42d14a093c37d49567a9dd8e5237fdf704d9a83a992aa444df60420eda019. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI199911108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10af01334a77e5ec7c5ba560eaef111dbba78b6a61dcb85281c1657ad6390803. 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/SEWDL0731005.
Concerto for Oboe and Violin in C Minor, BWV 1060: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14112dc01845ff1409463339744d746ac2a37287e13be2d3ea313f505fc54a5f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI199910614.
Brandenburg Concerto No. 4 in G Major, BWV 1049: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d7849c5630e7a5951e835b50288d51b8190fe14fe5def350baee19f39dc671. 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/HKI199911202.