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 0xe5773e0ea042ba8c8fe4ae49c27d32dc292170777fb284b86ee6521f75e91afd. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75980113-a673-4f40-9b25-d02d2bbc3842.json and https://artists.proofprofile.net/proofs/artist/75980113-a673-4f40-9b25-d02d2bbc3842.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
J.S. Bach, C.P.E. Bach & G. A. Benda: Cembalo Concertos
Bach: Violin Concertos - Concertos for 2 VIolins
Orange Edition - Haydn: Concerto for 2 Lyres No. 2 & String Quartet, Op. 64 No. 1
Red Edition - Haydn: Concerto for 2 Lyres No. 2, Hob. VIIh:2 & Keyboard Concerto No. 2, Hob. XVIII:2
Green Edition - Haydn: Concerto for 2 Lyres No. 2 & The 13 Part-Songs
Blue Edition - Haydn: Concerto for 2 Lyres No. 2 & Symphony No. 59 "Fire"
Green Edition - Haydn: Concerto for 2 Lyres No. 2 & String Quartets, Op. 64
Classical Selection - Haydn: Quattro piccoli concerti
The Classical Collection - Händel - Obras maestras orquestrales
Enciclopedia de la Música Clásica Vol. 6
Los Grandes Genios Beethoven Sinfonía No. 9
Ludwig Van Beethoven - Symphonien No. 1, No. 3
Handel: Concerti Grossi, Op. 6, Nos. 5-8
L'Estro Armonico, Op. 3 - Concerto No. 10 in B Minor for 4 Violins, Cello and Strings, RV 580: I. Allegro
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 0x55786b8a68997e79817078a00a002b11b0d858ff3f54ce122922cbfec6a175b4. 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/SEWDL0762607.
Johann Christian Bach: Sinfonias Op. 6, 9 & 18
Bach: Concerto for 2 Violins & Violin Concertos Nos. 1, 2
Violin Concerto No. 1 in A Minor, BWV 1041: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3894b8a9511a05ec2c3ca77bc2d0d74d7d7242d20b2a8a265a39e34b082825ef. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSJ10814340.
Violin Concerto No. 1 in A Minor, BWV 1041: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560447abc6462cd67d703c7be2f25a0664ad0249bf82a16ed7f8f7fea7c9c3df. 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/USSJ10814341.
Violin Concerto No. 1 in A Minor, BWV 1041: III. Alegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453b46823796ce5d264c96389df5a36f89b517edbc6e872a674db2b590408c63. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSJ10814342.
Violin Concerto No. 2 in E Major, BWV 1042: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781a58ef37d4d8893fe9ba1d57681b7ac0be4c29e9b6f2d1209ba84bbc90935a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSJ10814345.
Concerto for 2 Violins in D Minor, BWV 1043: I. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73367a94b475c33cf19d751a8e99a39afc637e2a01042f67d75e3ee8e86081d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSJ10814346.
Concerto for 2 Violins in D Minor, BWV 1043: II. Largo ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a79c17bccdd42816f0685d840e1edc41b69ed46a4e84d7af9d5477b81d3e03b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSJ10814347.
Violin Concerto No. 2 in E Major, BWV 1042: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e414b95d734154dcad0679754b4e4ce4eab8c48b5f7d22a9413eb67e523fec. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSJ10814343.
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
Violin Concerto No. 2 in E Major, BWV 1042: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a096b3e93129b6292b5c72a45b6d8a7d4f3b463ee9bdbb35486387110c1a8a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSJ10814344.
Concerto for 2 Violins in D Minor, BWV 1043: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ace8361587d48b3700d04274d8f89b2d6ac5642fe42718276ca69896af5b45. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USSJ10814348.
Concerto for Organ and Orchestra Op. 4, Nos 1, 4 and 13
Joseph Haydn: Classical Dreams, Schoolmaster
Bach: Suites for Orchestra No. 1, BWV 1066 & No. 2, BWV 1067
Table Music No. 2 * Erquicktes Herz * Heldenmusik
Concerti for 1&3 Cembali * Concerto for Violin and Oboe
Clásicos Románticos de Siempre, Vivaldi: Las Cuatro Estaciones
Johann Sebastian Bach: Conciertos para Clavicémbalo
Grandes Maestros del Barroco, Bach: Conciertos para Violín y Concierto Italiano
Vivaldi: L'Estro Armonico, Nos. 8-12 - Violin Concerto No. 2
Symphony No. 9 In D Minor Op. 125 Choral (Ode To Joy) / Part I & Part Ii
Soloists And Choir Of The Bratislava State Opera
Top 200 Classics – the Very Best of Classical Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0fc75306fda75facb2557e6020de1ecf9a63ccfe6b8cad8302b174205bc3ce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R31015970.
Symphony No. 9 in D Minor, Op. 125 "Choral": IV. Presto - Allegro assai - Chorale Finale (Ode To Joy)
The Greatest Classical Collection Ever: 222 All Time Favorite Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbd00e67ed6999a66bc87b68c8d2b029bfaaacb8ef413944de881074a19e976. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R31334335.