The Pro Arte Orchestra was a British symphony orchestra founded in 1955.Potts, Joseph E., “Orchestral Profile – The Pro Arte Orchestra”, The Gramophone, October 1959, p. 163 (p. 33 in online version)
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 0x2befb943fe95e7ca31a5da3c6ab58dd74b6963c84af9d4ff470ad34214ead749. 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/1b6adcc6-33e9-4c45-b708-38411b0e6a21.json and https://artists.proofprofile.net/proofs/artist/1b6adcc6-33e9-4c45-b708-38411b0e6a21.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Janácek: Sinfonietta, 4 Opera Preludes, Taras Bulba
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 0xf77e184a16c197ecb24d1292fd663af523e63eba121527c38e4b500090f1cac3. 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/USX761938001 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5efce4b4b0ab6cdd95a40b64f8244c9c0e3d640cc25abc4360857212d8e9476. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9700308 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd14b069bb9ec31c4c529649c2dd8f5a324ac6322c0c6e7cd7e3c5f29eb40401. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9700305 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5efce4b4b0ab6cdd95a40b64f8244c9c0e3d640cc25abc4360857212d8e9476. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9700308 — a six-check JSON result.
Manon Lescaut, Act I: Donna non vidi mai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d7c19eed12640fcf51ec63a90c7bf62dfe6b566f440af31564008af29c8a02. 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/GBAYC9704937 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99e0894a713eed8ea7460ca08878da1ef27bf8bdd2ad569c72749ce3b8e89f3. 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/GBAYD9700306 — a six-check JSON result.
Benjamin & Cimarosa: Oboe Concerto in C Minor: I. Introduzione. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f10856042b39b04c4342594c4ebaeaff9393d93224eb76e52667e14579a48ec. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAYC2001043 — a six-check JSON result.
Marcello: Oboe Concerto in D Minor: II. Adagio (Performed in C Minor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fea7f2190326f702f17164e149486ffce9c0a7134eb3035e2c568773a0669a4. 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/GBAYC2001041 — a six-check JSON result.
Springtime - Suite: III. Dance in the Twilight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c82e4ebf4720281ebbcb1aed0057f2b855d88488258e6a3dc5741812916a8d. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9700302 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e2521cce273e58cd23a07c96ab68cdbf60685cecbd34dfa2181ad7ad475e28. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9700303 — a six-check JSON result.
The Mikado, Act I: Behold the Lord High Executioner! (Nobles, Ko-Ko)
Sir Geraint Evans/Glyndebourne Chorus/Pro Arte Orchestra/Sir Malcolm Sargent
The History of Opera: English Language Opera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5949d54a72087d3a9dd0c6e7c7b83a9735ecf197163ea05421bf3bb2a1f70e65. 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/GBAYC8700573 — a six-check JSON result.
The Mikado, Act II: A More Humane Mikado (Mikado, Nobles)
Owen Brannigan/Glyndebourne Chorus/Pro Arte Orchestra/Sir Malcolm Sargent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693cea18ed22a25548ab3ff542c57e6f2133541af9c7ee3f3ec9ff687848e937. 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/GBAYC8700588 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf805abdcbe817880091db8d661162f2fba3b9906c3df5d8a145de96840e9a30. 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/GBAYD9700307 — a six-check JSON result.
Harpsichord Concerto in C Major, BWV 1064: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3f72f1423c9c54dd49a3e07826ea4e1820277dd392b7d10f5529c5a79cfe32. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSLT1906008 — a six-check JSON result.
Coates: The Merrymakers (A Miniature Overture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0296fdfea63f82d3b2ecd3ca87d9f7a6206e974cbc5099a5690237d71dcc66fc. 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/GBAYD9200480 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e2521cce273e58cd23a07c96ab68cdbf60685cecbd34dfa2181ad7ad475e28. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9700303 — a six-check JSON result.