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 0x5126979736a74ce4d248e45e439a4dacf073f8023712b6ef2b8bfc344276bd12. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb143ae2-570c-4626-8731-c8ec42ae2aac.json and https://artists.proofprofile.net/proofs/artist/fb143ae2-570c-4626-8731-c8ec42ae2aac.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Rigoletto: Fantasia di concerto pour clarinette et piano
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 0xb9f09825d7c166be4a6c56b535da8075b4dc1b2dab255f7cba1b8a71951d8a93. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140013050 — a six-check JSON result.
Theodorakis: Rhapsody for Cello & Orchestra, Rhapsody for Guitar and Orchestra
Platti & Vivaldi: 6 Sonatas for Cello & Basso Continuo
Solosonaten und Trios von Leopold Mozart
Platti: Sonatas for Violoncello, Violin & Basso continuo
Platti: 6 Sonatas for Violoncello and Basso continuo (1725)
Bach: The Sonatas for Violoncello and Harpsichord, BWV 1027-29
Concerto grosso No. 10 in F Major: I. Preludio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23a8643d6ab8664536eb674d3d72e0b6a17468ae042903d20401f529445a94d. 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/FRZ140728010 — a six-check JSON result.
Concerto grosso No. 10 in F Major: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd922217b37229e44864e415b8d3a971b23aac49cb4ebf26242261a11ec6f0bdb. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FRZ140728020 — a six-check JSON result.
Concerto grosso No. 10 in F Major: III. Sarabanda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607d883b1c9f41d255a6731cdfd4a97615e531969de1f243d3338242c638dcb4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140728030 — a six-check JSON result.
Concerto grosso No. 10 in F Major: V. Giga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a94281321e855adb73d95dc2b75e8dd56a273211516208ead907ab8645e4e5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRZ140728050 — a six-check JSON result.
Concerto con Violoncello obligato No. 8 in D Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5ee7d639f09512ab040c62bd098663a8c93cbe289793ab479a8d4122c1d1c3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRZ140728060 — a six-check JSON result.
Concerto con Violoncello obligato No. 8 in D Major: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b50c368f7b7da5262800dc004e8a7de4bed3ba57eb138cc613dd09adeb38b8c. 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/FRZ140728070 — a six-check JSON result.
Concerto con Violoncello obligato No. 8 in D Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede5208ffba4ca1c1173344d2b970f4d0cc7ea9bac82831d6f3298a11c56a129. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FRZ140728080 — a six-check JSON result.
Concerto grosso No. 4 in F Major: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7477c02e77abd538649b94ec61bf459feb0d680b9569c3762de7b2f1ab7c77e7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ140728100 — a six-check JSON result.
Concerto grosso No. 4 in F Major: III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661b30d26bfc7b8d67455bb712b39d26ba69c57e01f3c0d4bb52422edf05ea64. 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/FRZ140728110 — a six-check JSON result.
Concerto grosso No. 4 in F Major: IV. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1918c66a1a30bc74039af7a7be68060f629d194d3a1f15dd4603c065b8ef25a4. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FRZ140728120 — a six-check JSON result.
Concerto grosso No. 4 in F Major: V. Gavotta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84cfe6d9880f11b634b26058256491ec99bac7eae818125543004116dc4f6b0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140728130 — a six-check JSON result.
Concerto "per Oboé" in G Minor, I 47: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bef63702ef33c086a6f48cce8d8f7a83feb5ee43ce75e1938ccad26c014215. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140728140 — a six-check JSON result.
Concerto "per Oboé" in G Minor, I 47: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf031693e4d71b2ab55360bd2087f6c25b171ea4d1700729e116ab3cef187cdcb. 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/FRZ140728150 — a six-check JSON result.
Concerto "per Oboé" in G Minor, I 47: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9d89c6bb170ac8e674556b0d907199ef92328c43ae80bdfda379b20438d26e. 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/FRZ140728160 — a six-check JSON result.
Concerto grosso No. 5 in G Minor: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a7be20850d697cc21f929ca5f6ce820f51aa18a68707870c993773bc8f2b9b. 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/FRZ140728170 — a six-check JSON result.
Concerto grosso No. 5 in G Minor: II. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566519fd10839a2213bb5caec0ef317cf717d30b5cd78c13f71dfa039646d3be. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRZ140728180 — a six-check JSON result.
Concerto grosso No. 5 in G Minor: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d0629a01f1b65bc5679e3bbc16769a4a1e358891505f5d0a32a5869b594444. 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/FRZ140728190 — a six-check JSON result.
Concerto grosso No. 5 in G Minor: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbb1c584707abd4bc673d1859c90aaea54892d8f3b3fe0a164a3049ca8a792e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140728200 — a six-check JSON result.
Concerto grosso No. 5 in G Minor: V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ca3355b36537b829f7de810143aeb810ddd4367328f8b4f1fc80574308db09. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRZ140728210 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c3cf962fe95be18875cfdb1d4811a3def8dfa2dd9a0fd3d83d7cb73b8d1c74. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60802901 — a six-check JSON result.
Cinderella, Op. 87, Act II: Waltz-Coda (arr. M. Rostropovich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad761eac9b57d3c9a365baa15b5fa88dd9710b21306c0387cbf21e4db920a832. 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/DEAD60802914 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb76ee436cfc9c40c558cb313e7cde9096d3bda38941f164424608ce0f7bcded. 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/DEAD60802923 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d3188f47170431dc873c422f864e08ad4d7c771dd37226ed62b0081f700608. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEKD50900041 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b2716a358514b0505ccd5a4c99fa310b0e683ee7a851ccd3160820c31b2eae. 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/DEKD50900045 — a six-check JSON result.
Fortner: Sonate / Zyklus / Sieben Elegien / Trio
Bach, J. S.: 6 Sonatas for Violin and Harpsichord
Liszt: Dante Symphony - Wagner: Rienzi Overture - Scriabin: La Poeme de l'extase