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 0x121a481443db3fffcdd05b56970a9eb9bab7200c201ae83d5655c9a19adafd64. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7029ca71-5a1c-4f6a-9c69-528453f412ee.json and https://artists.proofprofile.net/proofs/artist/7029ca71-5a1c-4f6a-9c69-528453f412ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Passages. Hidden Treasures of Classical Piano.
11 Bagatelles, Op. 119: No. 1, Allegretto
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 0xe322ebfd20fc91606f09d04486adb3ed2f13c7ecab39b482bff110dbd8553c85. 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/DEPI82325411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506c97c64b44ff60b0fda7703338405834357b7f34b14abba40ac434558d6f4c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEPI82319112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908b16dd8a203f109317f494816e58e4d5cfa8dc0248c183193aa742189a43b3. 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/DEPI82323865.
Haydn: Sonata in D, Hob.XVI:37: II. Largo E Sostenuto - From Aeolian Piano Roll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5844f86d8114c214846d8ab1c30a8aa9a7ad32fa91bcda95033b8ea18154e3cd. 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/DEPI82304419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67339ee772016e33a9a16866a5f67163e667abbdb44b4b75fe9fb8f09d0570bf. 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/DEPI82313924.
Haydn: Sonata in D, Hob.XVI:37: I. Allegro Con Brio - From Aeolian Piano Roll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cfcf0225fa9a6c5dccaf1d3eaff23e86c0863c145781704d346a03cbc16e6a. 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/DEPI82304418.
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
Haydn: Sonata in D, Hob.XVI:37: III. Finale. Presto Ma Non Troppo - From Aeolian Piano Roll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4654039e8fac5d5589c90e0db70a677d8ed6839c310c15ca994a5a854073f2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEPI82304420.
8 Pieces for Piano, Op. 72: No. 4, Danse Characteristique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1915632e2370afd018275f6c053ff097dcb9253b37281835f5edf03540b6235. 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/DEPI82313922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73fbf7c533465d6dfe6d11097bd0bd33e86fe878f8a80edae2350ed07a20e9c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEPI82313923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb502678eb7cfc16df8a637c0ae20c96979ce8383ab916896e3e9ee9c6458e72. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82314144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176927ae3dac27a579468c7081232fefbb1fe0756eef26c10824eaf9e0193ba6. 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/DEPI82319230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57595fad9e8e1a85f318b0e8f0648fae3c5bb7c3763701a68b0057ce23d80a5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEPI82319233.
Conversations with Bach: Piano Transcriptions
Flute Sonata in E Minor, BWV 1034: I. Adagio Ma Non Tanto (Arr. For Piano by Irene Cantos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706906f57d875c50872e23a000c0d995cb8b7073846d960994c9b29f867d2684. 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/DEPI82308037.
Flute Sonata in E Minor, BWV 1034: III. Andante (Arr. For Piano by Irene Cantos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120e17a89261c52ab156b141ba71012508f52a49e32191263cf1c2e185dac8d8. 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/DEPI82308039.
Flute Sonata in E Minor, BWV 1034: IV. Allegro (Arr. For Piano by Irene Cantos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa562f40a0eab48da57504f6c6260b96cde7332ed57f54a00f0756e7e78e76bab. 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/DEPI82308040.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part V
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda8b8dc43509662b529cf7c27de2eb2f52c3d94564073c00a940dea1db4b644. 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/DEPI82312786.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part VII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88324d02a62447713c4520609ba8b70b9ca61eda273401c804e965141cc3244e. 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/DEPI82312788.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part X
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abde1d49b5970143a7cbee4727eb2977f9da5c28dc9129c600c14f1cf51430b. 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/DEPI82312791.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part XI
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241a6d3b1c33806771527877ab4e50563c1db40ffeef5da2edfaab6d28394f63. 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/DEPI82312792.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccc1f656c9956cbe061f883e238e817ca6ecc50503c8c1c5cc5bfec871eecef. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEPI82312782.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c827042f8c993d549ff07c95b23e05da1194e0cf7607089408d107d5f39868. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEPI82312784.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part IV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9963b551ca5d0352617be757545b3a1634b3d4f0afbc4fe18ece4c5a45e9c2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEPI82312785.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part Vi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e192910e4b644fbe29b4e3b4f051b2eaf1c59acc9716ed83280e2299e85fd0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEPI82312787.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part VIII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a0677818400fa6fb0f09b2bf7ef11ed7daace824225265821dd258e3ac648a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEPI82312789.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part IX
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4278cc5175353fcd02d45b3f856f38aa830bc7f645b07cccbd4104d6b9e1505d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEPI82312790.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part XII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8557ee5a980e7549126e4fc5ceab10fb3488d20c31d29c95ee35e0d3ac0c3dd1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEPI82312793.
Reminiscences. Hidden Treasures of Classical Piano
Fairy Tales. Hidden Treasures of Classical Piano
"063 Classical Piano Discoveries": Assisi