Ian Partridge (born 12 June 1938) is a retired English lyric tenor, whose repertoire ranged from Monteverdi, Bach and Handel, the Elizabethan lute songs, German, French and English songs, through to
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 0xb805df8162bd6bc5d18277bced0691b0f6d2661b16c5b95915ca3ac0561dc23a. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbac6da8-13b3-48b6-a538-309255e2430d.json and https://artists.proofprofile.net/proofs/artist/dbac6da8-13b3-48b6-a538-309255e2430d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
St. John Passion, BWV 245, Part I: Herr, under Herrscher (Chorus)
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 0xc664493432829c1612a1c06ae6cc370ba23b898ce59a2ac30cf2d0ba1aec1274. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9002101 — a six-check JSON result.
St. John Passion, BWV 245, Part I: Recitative. Jesus ging mit seinen Jungern (Evangelist, Jesus) - Jesum von Nazareth (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f45fc7ef711640eb26a583a258b31a783ac22d6b353c79f5b5e2ae5d4b7dd14. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9002102 — a six-check JSON result.
St. John Passion, BWV 245, Part I: Recitative. Die Schar aber und der Oberhauptmann (Evangelist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159c18593db22532d9fa44eb0c0aaac232cc127a4aaa1f70ffdfd14550b55166. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9002106 — a six-check JSON result.
St. John Passion, BWV 245, Part I: Aria. Von den Stricken meiner Sunden (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b735897c9adeed7d9800fb5c350d115380fb48e6aa4d888d3588e97a7711f7. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9002107 — a six-check JSON result.
St. John Passion, BWV 245, Part I: Aria. Ich folge dir gleichfalls (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfec8d14d38642e534edc3eba604cd6ce52bbb9f79c93d36d4dd05f965480769. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9002109 — a six-check JSON result.
Gloria, RV 589: I. Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b367cec3f0525ecebccbb860dfdf2c06e0fdcc9b5380ea60cef09f8a52f5f91. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076640001 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9b4779f22bc0f9b680a4431be96d4191efa2cee87286cd02e929c5314141b3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076640003 — a six-check JSON result.
Magnificat (Formerly Attrib. Pergolesi): Magnificat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944c0765c4447bf355f2a28a079862914206e5faca4ce051ec989b6889084c71. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610651 — a six-check JSON result.
Magnificat (Formerly Attrib. Pergolesi): Et misericordia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ca22736cb84df9e4ee42471496737606ed9fbc2066206e070156387d37584. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610652 — a six-check JSON result.
Magnificat (Formerly Attrib. Pergolesi): Deposuit Potentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fd6fe21c76b1e84f205fbd4f0ec64dec4c3d11c9ed527313e15927547c787c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610653 — a six-check JSON result.
Magnificat (Formerly Attrib. Pergolesi): Suscepit Israel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366f16dce1deebb287494a083224e700ff7a677728a85efba176b36397b2606a. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610654 — a six-check JSON result.
Magnificat (Formerly Attrib. Pergolesi): Sicut locutus est....Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69c23251e0b7c4d630ddf63600378ac25070d8f870a28922624a3d1a46f5a5a. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610655 — a six-check JSON result.
Artaxerxes, Act I: No. 10, Recit. Stay, Artaxerxes, Stay (Semira/Artaxerxes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b33f226bdd8a4150e10fd669ca0955780750d4140042afa79b35f0ecbbde59. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9505110 — a six-check JSON result.
Vaughan Williams: 10 Blake Songs: No. 1, Infant Joy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8233a249d67b9529c88f30309e8055b074ea1e2e67ed26bca944188966e0369. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8702956 — a six-check JSON result.
Bach, JS: Herz und Mund und Tat und Leben, BWV 147: Recitative. "Gebenedeiter Mund!"
Academy of St Martin in the Fields - Bach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee7d1924bc4d57c03ef9d4b9fe8a575eff87ecfeb59994a65c626a13714cc00. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1902080 — a six-check JSON result.
Madrigals, Book 9: Non voglio amare, SV 172
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84f3fb79c49fa45b93de3a0c800d7cc1d1e1e69dec2619a0534a717cb192f8c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057100590 — a six-check JSON result.
Bach, JS: Herz und Mund und Tat und Leben, BWV 147: Aria. "Hilf, Jesu, hilf, daß ich auch dich bekenne"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ea5a5a29cc00fa66066182662a94c02625c0b7a35519c266622d64db954c10. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1902085 — a six-check JSON result.