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 0x47d914454f8411b0fc86ff268e0cc11583ebc1954957458cde0fc1c30fe997c3. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/166b1292-8b99-475a-b014-a2c872ee5d23.json and https://artists.proofprofile.net/proofs/artist/166b1292-8b99-475a-b014-a2c872ee5d23.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Евгений Онегин, соч. 24, действие I картина 1: No. 7, Заключительная сцена
Национальный филармонический оркестр России
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 0xb1eb787f60732c9edd5a4c2f1ece561555155b59481c2831a9bd88a8a66228f5. 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/RUA1D2205348.
Евгений Онегин, соч. 24, действие I картина 1: No. 5a, Сцена и квартет "Mes-dames! Я на себя взял смелость"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1750f4a720b2b4268b0677df46f18cfb5649db9bad1415021c3c6f2c6589d22. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/RUA1D2205346.
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
Евгений Онегин, соч. 24, действие I картина 1: No. 6a, Сцена "Как счастлив, как счастлив я" - No. 6b, Ариозо Ленского "Я люблю Вас. Я люблю Вас, Ольга"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30750eba156831edcd4fe71fd14c3ee9b156f429aab68b0d6d1f8cd3529504d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/RUA1D2205347.
Евгений Онегин, соч. 24, действие II картина 1: Антракт - No. 13, Вальс со сценой и хором
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bf5b5f86a1f79dea3e7c03e53114080fdbdafd632b6957e5c1d872ffe5a3f0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/RUA1D2205354.
Евгений Онегин, соч. 24, действие II картина 1: No. 14a, Сцена "Ужель я заслужил от вас усмешку эту?" - No. 14b, Сцена и куплеты Трике "Какой прекрасный этот день"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a489fa52d57218a21047e7e323f2f31a37e40b94e8736d0c8a6d7323d237cb9. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/RUA1D2205355.
Евгений Онегин, соч. 24, действие II картина 2: No. 17a, Интродукция и сцена "Ну что же? Кажется, противник" - No. 17b, Ария Ленского "Куда, куда, куда вы удалились?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf145299ef195e356c7e4ad9aca4d505f14d003465620f783c53ef20560c826a5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA1D2205358.
Евгений Онегин, соч. 24, действие II картина 2: No. 18a, Сцена поединка "А, вот они!" - No. 18b, Сцена поединка "Враги! Давно ли друг от друга?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fb3768db34c23bf0a52817dd9844f530ffd9de0f34f3d4e1b68432390b73d7. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA1D2205359.