Dmitry Stepanovich BortnianskyRitzarev, Marina: Eighteenth-Century Russian Music. London and New York: Routledge, 2016. P. 105.The Cambridge History of Music (28 October 1751 – ) was a Russian compose
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 0x6732019932f0cbf7b105da13067efcff57c49190c7ef73d1c46c8ce8eb8323a3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e474218-5737-42b6-93c5-15bf49372279.json and https://artists.proofprofile.net/proofs/artist/1e474218-5737-42b6-93c5-15bf49372279.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bortniansky: Concertos for Choir Nos. 11, 33, 19, 1, 21, 7, 18
Bortniansky: Concertos for Choir Nos. 12, 9, 29, 20, 30, 24
Bortniansky: Concertos for Choir Nos. 34, 2, 14, 13, 17, 31, 22, 26, 6
Bortniansky: Sacred Concertos, Vol. 6: Sacred Concertos for Double Choir
Bortniansky: Baroque Chamber Ensemble, Vol. 2
Bortniansky: Baroque Chamber Ensemble, Vol. 1
Bortniansky: I cried out to the Lord: Hymns and Choral Concertos
Izhe Kheruvimi (Cherubic Hymn): No. 7. —
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 0xa12e9070c7ee2d061d782520c775afde53e7207dc03a39053e9e8a6f3a3bc4e5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI191253001.
Sacred Concerto No. 15, "Priidite, vospoim lyudiye" (Come, let us praise in song, O people): II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e29dd986db869950d6ecec621436007ca6038c7edd7909d9a78ec77f2e56acc. 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/HKI191253003.
Sacred Concerto No. 21, "Zhiviy v pomoshchi Vishniaho" (He that dwelleth in the help of the Most High): IV. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724a5e6b1d5f2bf4d660599934813cb9ad4224e1beb106b9b923841ee102e3ff. 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/HKI191253008.
Sacred Concerto No. 6, "Slava vo vishnikh Bohu" (Glory to God in the highest): III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae695254aa6092ef8bf0e5f64192275bf16632c4b8e1bd8a933ed3428b470fd. 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/HKI191253018.
Sacred Concerto No. 6, "Slava vo vishnikh Bohu" (Glory to God in the highest): IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e5dfb78b3171211f8b9f14065a7568715fb58652278418b4d5ce44eb95fc76. 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/HKI191253019.
Sacred Concerto No. 18, "Blaho yest' ispoviedatisia Hospodevi" (It is good to give thanks unto the Lord): I. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ad55d083ca7eb9873a4b67981cd5fd8b6f7b61fbc1726441b842c855944273. 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/HKI191253020.
Sacred Concerto No. 32, "Skazhi mi, Hospodi, konchinu moyu" (O Lord, make me to know mine end): IV. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353c918201895841e11f37505ecfb18961d929033542ce751f4025ae2e2c443d. 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/HKI191253027.
Sacred Concerto No. 9, "Sey den', yeho zhe sotvori Hospod'" (This is the day which the Lord hath made): I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7a7e6f69b6912eec03967eb00f3ee453042842f8f27d09ebbca53d85a8d381. 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/HKI191253028.
Kol' slaven nash (How great is our Lord in Zion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a33393f68f14356bf1c97154c242aed40ced30aa5e858f8fb34c8379b7633f7. 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/HKI191253031.
Bortniansky: Sinfonia Concertante & Quintet
Bortniansky: Concertos for Choir Nos. 16, 3, 35, 5, 27, 8, 23
Bortniansky: Concertos for Choir Nos. 4, 28, 15, 10, 25
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec2ac1f4a4ca7fc2621a7b01fa712cfb22b0c6aa2b7bc96cf9c28ba82373f92. 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/US23M1100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6fee4243190d3dde375fe90837e16bf2b90c5cebb9e6865a9ce8f7db83a80e. 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/DEB261201582.
Kol' slaven nash (How glorious Is our Lord in Zion) [arr. I. Ushakov for male choir]
The Male Choir of Valaam Singing Culture Institute
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c677ce2a6519dc4f01e6b803e1794b249bee2115e3cf583f98fb5507cf40e13. 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/CZH401112903.