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 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, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1521567.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1521568.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1521569.
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
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK2Y21303655.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK2Y21303681.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK2Y21303663.
Sviridov: Time Forward! Suite of the Film Score
The Ussr Tv Radio Large Symphony Orchestra
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539611.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12076d75c8980849788b78094573f4a2e5a48294292c0957049c4f21a584a3f4. 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/FR6V81539613.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539614.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539619.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539624.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539618.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81539620.
Как много девушек хороших (Лирические шлягеры)
Shostakovich: Katerina Izmailova, Op. 114
ARSM III, Vol. 1. Rimsky-Korsakov, Taneyev