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 0x790418a15acb3e40e3d34fee215c52f097aae01029a3c378b792a3be3ea4b0d9. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33c9383b-1754-4993-af3f-cbe139254104.json and https://artists.proofprofile.net/proofs/artist/33c9383b-1754-4993-af3f-cbe139254104.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Monti: Csárdás. Largo maestoso - Allegro vivace (Arr. for Violin and Instrumental Ensemble by Mikhail Parhamovsky)
Klassiska mästerverk [Klassisk musik av de största kompositörerna]
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 0xe9a1c34c592cb3bbcdf23090dc07c59595fb5ea7eccc97462051794d89a19011. 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/GBAYC0101656 — a six-check JSON result.
Classical Masterpieces [The Best Classical Music From the Great Composers]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a1c34c592cb3bbcdf23090dc07c59595fb5ea7eccc97462051794d89a19011. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYC0101656 — a six-check JSON result.
Khachaturian: Gayane, Op. 50, Act 3: Sabre Dance (Arr. Parhamovsky for Violin and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b6b28f3eefa0b2b23e7aaaa4ae154e7d26ca792eb54e276a8431e31dac4065. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/GBAYC0101654 — a six-check JSON result.
Nováček: 8 Concert Caprices for Violin and Piano, Op. 5: No. 4, Perpetuum mobile (Arr. Parhamovsky for Violin and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb296c3954b569025dda3542a054e7f05044c3b92788b46885c20d0d70a37d36b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBAYC0101647 — a six-check JSON result.
Brahms: 21 Hungarian Dances, WoO 1: No. 7 in F Major (Arr. Parhamovsky for Violin and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45be1d19124b1dad859e3ee47d12aa521c71109c148c9cce4774393b4ed228cb. 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/GBAYC0101644 — a six-check JSON result.
Rachmaninoff: 14 Romances, Op. 34: No. 14, Vocalise (Arr. Parhamovsky for Violin and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca6f8a5e00410c28d9dd0b8ecedae1f3a48763f8ba247377d164355dd8e975b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBAYC0101641 — a six-check JSON result.
Brahms: 21 Hungarian Dances, WoO 1: No. 5 in G Minor (Arr. Parhamovsky for Violin and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91d3dadbb7bb0333020c69e46d29d482dead4fefc4881f6aa3f18e9025f73a9. 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/GBAYC0101646 — a six-check JSON result.
Dvořák: 8 Humoresques, Op. 101, B. 187: No. 7 in G-Flat Major (Arr. Parhamovsky for Violin and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9205454edc7cd67165a4afc66399ef252ee3b61e929607eb79930e7c1558137c. 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/GBAYC0101648 — a six-check JSON result.
Schubert: Ave Maria, Op. 52 No. 6, D. 839 (Arr. Parhamovsky for Violin and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55238b112a63c469053134b944f89fa686dfa3d192622681a2dc1f0164e9dfff. 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/GBAYC0101652 — a six-check JSON result.
Ponce: 2 Canciones Mexicanas: No. 2, Estrellita (Arr. Parhamovsky for Violin and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9df7da4c7d315ad4fde98feeaf525b2a20ba68cf888ffaca87bd463cdf3145. 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/GBAYC0101642 — a six-check JSON result.
Monti: Csárdás (Arr. Parhamovsky for Violin and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a1c34c592cb3bbcdf23090dc07c59595fb5ea7eccc97462051794d89a19011. 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/GBAYC0101656 — a six-check JSON result.
Schön Rösmarin - Kreisler, Mozart, Tchaikovsky, Beethoven, Paganini, John Williams
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91d3dadbb7bb0333020c69e46d29d482dead4fefc4881f6aa3f18e9025f73a9. 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/GBAYC0101646 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9205454edc7cd67165a4afc66399ef252ee3b61e929607eb79930e7c1558137c. 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/GBAYC0101648 — a six-check JSON result.
Brahms: 21 Hungarian Dances, WoO 1: No. 1 in G Minor (Arr. Parhamovsky for Violin and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193b32e3b9dcff06c9dc409846acd2d0e727aaa4ed6fd7e4d5ae4fc3cdc79917. 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/GBAYC0101645 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b6b28f3eefa0b2b23e7aaaa4ae154e7d26ca792eb54e276a8431e31dac4065. 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/GBAYC0101654 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45be1d19124b1dad859e3ee47d12aa521c71109c148c9cce4774393b4ed228cb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBAYC0101644 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55238b112a63c469053134b944f89fa686dfa3d192622681a2dc1f0164e9dfff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYC0101652 — a six-check JSON result.
Bazzini / Arr Parhamovsky: Scherzo fantastique Op. 25, "La Ronde des lutins" (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a202d8292e3d97a7a10f44b6b92f94e3ff7ef7ba99b343a212292d65e89a18. 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/GBAYC0101653 — a six-check JSON result.