thumb|Ivan Semyonovich Kozlovsky in 1942 Ivan Semyonovich Kozlovsky (21 December 1993) was a Soviet lyric tenor and one of the most well known stars of Russian opera, as well a producer and director
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 0x03c1b0365acc86b89c0722c0fbb62168b0fa301dcb0500442f1736bc85e459af. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5aae4c3e-2837-44e4-8672-5f50fc302602.json and https://artists.proofprofile.net/proofs/artist/5aae4c3e-2837-44e4-8672-5f50fc302602.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Russian Vocal School: Ivan Kozlovsky (1947-1957)
The Queen of Spades, Op. 68, Act III Scene 7: Herman`s Aria "Chto nasha zhizn? Igra!"
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 0x7ec7600253138360df4ca8cacb7ece3680c377d3529039c73a4c200fbd05e1ec. 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/UK2Y21310549.
The Nutcracker, Op. 71, Act II Scene 3: Dance of Prince Orgeat and the Sugar-Plum Fairy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6399a71ed3c5f131e1d2f3ed350cd9cad9589e91ab32c3d8101fce8d55bae7de. 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/UK2Y21310538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd635e5284a415d2db4d087262c995fddb0e1d2bbc3a8badf85fdbf4b007029c. 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/UK2Y21310524.
Romeo and Juliet, Op. 64, Act I Scene 2: Dance of the Knights
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78380d187ed5ee39b5fc39295ae5cbdc03ee0ed33ef2adf876768a96d1c1a99a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK2Y21310553.
Rachmaninoff: Complete Operas, Cantatas & Fragments
Ukrainian Songs Vol. 1: Boris Gmyrya & Lev Ostrin
Rimsky-Korsakov: Complete Operas & Fragments
Beethoven, Schubert & Liszt: Songs & Romances
Tchaikovsky: Eugene Onegin, Op. 24, TH 5 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b380cfec188d064d7c6e2c2096a5feb781b1a09167dbee0eb53dacf92bafbe. 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/QMFMG1480478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94241e6d2b80b93200a2967a52d0e3e490053a702743b60df21040b3b1150e76. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1480479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11f1ea607d8381b2418b2621c848f8af1f3d44c301b9837d7ac5349c55b5a84. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMFMG1480477.
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 0x5a09b06c82bfe1006bd48d560327568a7ea38588ebdd0e0b78925db47205eb66. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMFMG1480480.
Придите, поклонимся. Благослови, душе моя, Господа
Московский хор молодёжи и студентов п/у Бориса Тевлина
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0b422ff3a5a00c247963548b426e824e4ab0865f8a17327f34eae1c4f209db. 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/UK2Y21308779.
Всенощное бдение, соч. 44: No. 2, Благослови, душе моя, Господа
Хор Московской церкви Рождества Пресвятой Богородицы
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f79840e77e94021b0b146c2d61d2311dae8cfdf1f51f544514111e6794599c. 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/UK2Y21308825.
Всенощное бдение, соч. 44: No. 3, Блажен муж
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6441f68821134b0748f3ea887377dc203dcc6dd5a5e0fe1f069e35cb91700e71. 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/UK2Y21308826.
Мужской хор сотрудников издательского отдела московского патриархата
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3680b092c8021e487984d03084f2374bd2471be57cf555302f979b68afe16b5. 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/UK2Y21308794.
Anthology of Russian Romance: Ivan Kozlovsky, Vol. 2
Anthology of Russian Romance: Ivan Kozlovsky, Vol. 1
Velikie ispolniteli Rossii XX veka: Ivan Kozlovskiy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf98c6dfd206b5595ff38d613ea05ef3cc0ce3a714e9f632ba02ac1c2c8df3a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR2X41568233.
Dukhovoy orkestr Ministerstva oborony SSSR
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6702db230cf5c04d320252713bef13620f020caef2e74f449f0cb77113b5c3cb. 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/FR2X41568241.
Gosudarstvennyy Akademicheskiy Simfonicheskiy Orkestr SSSR
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8606e76bba3a046184d92e056be36045dc94a8b78120cb2a757dbcca139b11bf. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41568215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004042de53bf967c7380eaba826181054b08e40898ad5c56262acd475cfc2f59. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FR2X41568238.
Gosudarstvennaja kapella banduristov USSR
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe168f842a8b5ab013c8fb6974d394fb3a9de83c22f50c19ff57666a8a2e755. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR2X41568244.
Поёт Иван Козловский (2021 Remastered Version)
Liricheskie pesni: Ognei tak mnogo zolotykh...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b743e2ff22f1f5317ba28d55b1371013183b1218235bbc609abe522e4581827. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR2X41699538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06101eaa49f2fdf0924f36cc11196af8d74fca712c46d7a3f1c167ac52f895fd. 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/FR2X41699542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307191051df021e5b55864b6df4953e403481801d12ef51919ef660cabd1f210. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FR2X41699554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a81c4d52202e32651a747835b38b2d54039b4e986a7d423c64a2c907a2bfbc2. 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/FR10S1651181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc393640a3d8164d9ef0cbbcd418b6ded804f64635a8e70e22c6991996c78fbd8. 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/FR10S1651192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab62441f55df1e075079a7024f0d30718e5b65f4789b77e0948a5f015095f9d. 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/FR10S1651196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3887a5900d41f736264f6fb3482c32a216b7d91543b5043b3f715cac696a573a. 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/FR10S1651200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbea0fa177e12422aca7c539bc7fdc7113f84ae928075ab1b764a0b9e540afca. 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/RUA582100534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48abcd58858aaa52d98c045804513c4b3250b9bd73afec8905e4474d89803618. 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/RUA582100535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2620aff9452a54a6e0efd83cbee27f7e523bc85fffa5386c93ae7bb0a30c3782. 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/FR2X41502669.
Velikie ispolniteli Rossii XX veka: Luchshie estradnye pesni pervoj poloviny XX veka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4cb1da8a3ec36d87d73e4c3d2f0aa65e23ecd708874bba855cedad4c5aa1ca. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R1504970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5f592c4f827618b87e9936c29f6a06762b947c05fd75159bc8ce9c509afbaa. 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/FR59R1504977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc662a8b60b9db25ffb05fc03b0b4523053baba2612f3191d396370a21d466de. 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/FRX452192869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667fae22de8d332411e96a35621b10adca2dbbdeebf48307e98b1936e608b4c2. 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/FR2X41685695.
Tchaikovsky: Complete Operas, Fragments & Incidental Music
Songs of Old Russia / Popular Russian Music From the 50's
Anthology of Russian Romance: Old Russian Romances, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a08015572a9e2279e9bc4bc0efb665957e4648b7f0b9363eaa05da098fe0e04. 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/FR59R1542355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3302f11796e3ad47479e624496d93d39e829bf689347aba1c02e19ed7fed4d93. 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/FR59R1542400.
Ukranian Music from 78 Rpm, Soviet Recordings 1930 - 1950
Клён ты мой опавший (Лучшие песни и романсы на стихи Сергея Есенина)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138d9d82ca54630d35badfcb17dca1b978a0eaa8eb2510429439eff1c23d6816. 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/RUB731571496.