Jeffrey McFadden is a Canadian classical guitarist, and a recording artist for Naxos Records. He is known for his recordings of works by composers of the romantic era such as Fernando Sor and Napoleon
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 0x24eaddf4c12318119acd1fab6a2c5f0c16c717e48517176316c32c43b8f37278. 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/3d8519bc-4119-4d06-9a59-bc8d1239bdaf.json and https://artists.proofprofile.net/proofs/artist/3d8519bc-4119-4d06-9a59-bc8d1239bdaf.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 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 0x0382242ac8182259c2398d357dab3278520f46cf8576c8bc4bda5aefa7c5f8dd. 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/HKI199911316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35edb3f1b4ae94b5582455b7b14e5f6b5c9dff0dede0065882612849f0bb0ddb. 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/HKI190423201.
Brandenburg Concerto No. 6 in B-flat Major, Bwv 1051: Ii. Adagio ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46ad32d02c7da769f4c62b1f148a2f183888b03ffd0f208867b11507d3491b5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKI199911112.
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 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/HKI199627001.
Sonata No. 4 for Violin and Harpsichord in C Minor, Bwv 1017: I. Siciliano: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24343c3a0cdf9599e777caf0cbaa0904e03358733746fe4bb12ba201397bedaf. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKI199910513.
Keyboard Concerto in F Minor, Bwv 1056: Ii. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827eb9645ea7c59ae415293e716b67649da6184331012e18a7000619da9fdb31. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKI199910811.
Flute Sonata in A Major, Bwv 1032: Ii. Largo e dolce
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4257904cf9e5a580b01eaeb8875d87ec282cf164c928bd49d5a6bd702d6bfeb. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/HKI199608613.
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 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/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 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/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 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/HKI190446501.
Partita No. 2 in C Minor, Bwv 826: Iv. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cabc799c2b6233182bf4481c2a8ed919304d71fef7a4f6268d15356da0ab10. 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/HKI199279110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217c67020b33d38755c6c90a9ee5c8f636aba9eed692a0e8889bd3c3ab02fb96. 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/HKI199635812.
Valses poéticos: Melodico (Arr. J. McFadden)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c1f30634a9568d5d173adf50edbc6e69cf3d1e16a51fabb0c714c81ec4533a. 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/HKI199610902.
Cello Suite No. 1 in G Major, Bwv 1007 (arr. J. McFadden for guitar): Iv. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf1e6da7e944a8fd5dcc1b46a54b8f7afc432e1e038ddfcf88f47787ab39bd2. 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/HKI191955404.