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 0x00a2ff2e6359d0e5fe0f446294f80754660bf0b3bf861ba34e2910a50114e3cd. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48b1b7c6-f7b0-4c9a-8ed0-0ecb3bd0dbb9.json and https://artists.proofprofile.net/proofs/artist/48b1b7c6-f7b0-4c9a-8ed0-0ecb3bd0dbb9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sinfonietta on Russian Themes, Op. 31: I. Allegretto pastorale
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 0xc4c4064cf4edb1dea2d003cf8a36fda0317fb394c1d35bdb63427d37389aaae5. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USB8U1521564 — a six-check JSON result.
Sinfonietta on Russian Themes, Op. 31: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c96d1c16430b060aa7872843b72517783684a3bc968b3fbf92d89f0969a774. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USB8U1521565 — a six-check JSON result.
Sinfonietta on Russian Themes, Op. 31: III. Scherzo - Finale. Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d24048ef85bf77fce69ca9cabf5cd49ad54508f9a850fbf25c5987e1f60f79. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USB8U1521566 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00f76304f6d9bd77e00bfc45e405e6eca04d689ba6d4cfed43864d2a42a428a. 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/USB8U1521567 — a six-check JSON result.
Svetliy prazdnik (Russian Easter Festival), Op. 36
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6327a3b26e91835d8a437cf90a52571557dc99d5ed699b49b36f65f51d948f7b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1521568 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4054ddcd56990a1e56f5d2c9b4aa9c38ce7d1b55334b319f98dcc7c92530bab. 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/USB8U1521569 — a six-check JSON result.
Rachmaninoff: Complete Operas, Cantatas & Fragments
Prokofiev: Betrothal in a Monastery, Op. 86
Betrothal in a Monastery, Op. 86: Introduction
Stanislavsky and Nemirovich-Danchenko Moscow Music Theatre Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adb704fe11e47e2b68788c81b0bcfef95deb8d149fd9bfc5530d082bd4187a0. 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/UK2Y21303655 — a six-check JSON result.
Betrothal in a Monastery, Op. 86, Act I Tableau 1 Scene 1: "No eto khimerichno!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb817fbfc53a467363300dabdca619542e3db9088517cbb0494203ae83367ab50. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK2Y21303656 — a six-check JSON result.
Betrothal in a Monastery, Op. 86, Act I Tableau 1 Scene 2: "Nekazist, sutulovat"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd05f85c5f2522c82878a00fc124b1450e98e3205719f483b4af9b2fe851703. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK2Y21303657 — a six-check JSON result.
Betrothal in a Monastery, Op. 86, Act III Tableau 5 Scene 3: "Vzglyanut tikhonko"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0684b6653be373a558197a0819a1d871c8d6c7ac66fcc9bf5390513a253810ff. 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/UK2Y21303681 — a six-check JSON result.
Betrothal in a Monastery, Op. 86, Act I Tableau 1 Scene 6: Masker's Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6e30be327719c81ff157319a48b3098f3d0ed58f0a87630d2df931d51970a1. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/UK2Y21303661 — a six-check JSON result.
Betrothal in a Monastery, Op. 86, Act I Tableau 1 Scene 8: "Druzya, ukhodite"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd51b5ff95461d6bd4b9ed68dcd09c6f51ad39c27592b2d1f355a349c96a769. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK2Y21303663 — a six-check JSON result.
Sviridov: Time Forward! Suite of the Film Score
The Ussr Tv Radio Large Symphony Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827975e74fb8c84c4b94894b3e5c8a261ce0bbccf8c32b8bf93090f9f5c7c129. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR6V81539609 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfebc7f1c3d31dc1a50d2ab4c79d57272fe196aa3daa21859012ee7ebae7a83f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR6V81539610 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0247bf3c6a9043c8ca049437d5f0d46e2b3b0dbd4fece42661fad31087380f. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539611 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6c72e709e7dcd3123594bd5b1a9ae9c30d3d4ea42f1db0b1f14e1f6d01be31. 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/FR6V81539612 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12076d75c8980849788b78094573f4a2e5a48294292c0957049c4f21a584a3f4. 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/FR6V81539613 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f445c04a815ef958957bffec89d577cbc1bcf66d3e3f12a3d8e9829a8d1f8d. 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/FR6V81539614 — a six-check JSON result.
Music for Chamber Orchestra: No. 1, Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3db38e4200b8ae367798cf7901ef4f774ed63483d902d683bc064336170088. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539615 — a six-check JSON result.
Music for Chamber Orchestra: No. 2, Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f91da98d14b49f01c930cd1e97a116730b11f07b1ba815cf32a36a52d5cdd1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR6V81539616 — a six-check JSON result.
Music for Chamber Orchestra: No. 3, Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c5529b0bb313aa5c98bab62a904e827c46b2fffe33832d3129807c83f3504e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539617 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f7815f964d2a88d069f82c7fd63c28fd45df4298059585d3d8295ea659f724. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539618 — a six-check JSON result.
Pathetic Oratorio: II. Tale of General Wranglers Flight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8e533bb9886ab396f771f8a6961587d222e1b75cd2daf9dbe74fb293f88c55. 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/FR6V81539619 — a six-check JSON result.
Pathetic Oratorio: III. To Heroes of Battele at Реrekop
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ef0efb6d3c61ebffa748f7da5212ca5b1b7d14d57399751f4d80244aecb9de. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539620 — a six-check JSON result.
Pathetic Oratorio: VII. The Sun and the Poet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bccb69e7e0ca48fd6e8968e14d0cdde4f4757c472ea6c7477c28cfa6e316b8. 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/FR6V81539624 — a six-check JSON result.
6 Romances, Op. 6: I. Do Not Believe, My Friend
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc348b0aec976b97d03f1973fb65f8f2140c52c4a2f6de15a6e4c1fb2065f77ec. 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/UK2Y21501174 — a six-check JSON result.
Как много девушек хороших (Лирические шлягеры)
Shostakovich: Katerina Izmailova, Op. 114
ARSM III, Vol. 1. Rimsky-Korsakov, Taneyev