Kazka (stylized in all caps "KAZKA"; ) is a Ukrainian band that performs pop with elements of electro-folk. Since its creation in 2017, vocalist Oleksandra Zaritska, sopilka player Dmytro Mazuriak and
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 0xbddf85f5026cf4435a861d22afea415780eeb662b1e30740931898c94a524537. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0eb0f4f-c775-4c9c-b118-4e94606ded39.json and https://artists.proofprofile.net/proofs/artist/a0eb0f4f-c775-4c9c-b118-4e94606ded39.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 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 0x2ef4341fd60292522f49886bfdf431df9a2b7eabef4f3ff80d91a61c0043fa63. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX201746083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ddd6e93759b19b7a13c8e68df7137286ca84827724b9428dd8757bb53eef8e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UAMM11800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d1611017757bbc5ab13a85002d02f541094fa6ab7b7dd81da17de10a29707a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UAMM11800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd64a1b11e5a5290c7afeb010b10bd159824b2b8ce434063f115aba0a766294. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UAMM11800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8632e4a569b5e8447174dbbb70f9d447b9163831ebaa685f18618778b554a08. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UAMM11800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1fb53bbc074aa1743bc43475886fa69edd427ac23f145b0277a7d4e90342fd. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/UAMM11800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39379826c470309fa172af394922dbe54a766d13c20cec8a9963368eb88b3f58. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/UAMM11800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f29da02586c8f4c0dca70ecb504fdac9d84e135af19add79c3505a40c48af8e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/UAMM11600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39379826c470309fa172af394922dbe54a766d13c20cec8a9963368eb88b3f58. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/UAMM11800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca31f194b23edffc1715e3b0539763c0bac85ff340236974cf0b37a5aca96d2a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TRAA31900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef3107cfe979cd8b1eb3858116866b59e67a4ba4295897b15e03b76abd77630. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UAMM11900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6425c7f25ac88f12242c6e3fc10f8376b1df2e5c552c8a7bfa221a283e7e8c52. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UAMM11900037.
Пісня Сміливих Дівчат (Pasha Trimbeater Remix)
Пісня Сміливих Дівчат - Pasha Trimbeater Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b79086bf42d38fa596093e09e9f5062a74a7d2da7e837fb0b1d050418b7a974. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/UAMM11900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508133cda24b5545a47efd24d8857f7b037aa30e8952effab062767b1a72809b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/UAMM11900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb917ec257b39850370030d3ec1296fbef7c0b8edf12bc759575936130a0df05. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/UAMM11900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d664aef925d6630692b3abc7db3b67f17e7ca9704ad2f00a0352a33bf50295b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UAMM11900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b1fe4e825eaa47be69df333087bb80c6f7a1a0d2c721c930dd2b986f5bc4a. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/UAMM11900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a7d862e87fb19b316e4f93950c117c781f34c7ec37827a017a4269f4b77a6e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UAMM11900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c51ec7ca2f1c32edffca920dac80d1dc2c375329cf8a8d63b860840111e6ab. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/UAMM11900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354f2e937aeb1515f56d36a69376406bce6b03ae6a1f192227c18f5ec08c8a1f. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/UAMM11900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf4a1ddb5ef26804992f31d7c5d74695697729b58ee9fa720bbce298a8024f7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAFD2021386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d15c9956dd30d36bce24f51f7029466988a4126683fe505f2ea1c3bae7e42b0. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/UAMM12000144.
Красива серцем (From "Моя улюблена Страшко")
Красива серцем - From "Моя улюблена Страшко"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8d3e83cbbef1d26f5388fb2ab09aac8c45ff97696d9a5503d1488fc2ef8899. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/UAMM12100010.
М'ята (Stanislav Almazov & The Faino Remix)
М'ята - Stanislav Almazov & The Faino Radio Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26903a7a86f4ae8ed817678b732fd4a195a9a591cb560749e048f6162e0e16c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/UKEX32126263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32b3106fc747b126c12d422d14448d275b4d04af74f49b92ea1b8e7c482240f. 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/QMFME2157782.
Цілувати тебе (From "Моя улюблена Страшко")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf404513e331bdb4146c8697b2f85e1082643c7763654f00f90ff96ab7e96f73c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/UAMM12100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf60c07fe9bbb3f2b11e759eebc5ba421c2bfc210e9107c7088b59fed4cff17. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UAMM12100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c05c6e7b5bdaeeb7b31c17e3e1be4dc9fdda0070e2ea8f88f895d3e53788482. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR59R2192690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d939490622fb6b6102f40e705828d7614aeef9a9b935a44ee07b9c494f8c619. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UAMM12100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bd82b4044a1ac3d1c6d206de769122c2e58d61a803f3ca2e2fb737ed5b9ea6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/UAMM12300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5db7a6dcba9f29066c9a48d925c0ad60df559d895636bbe1a3d3e2c51e6e0d0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UABM12400545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1e2a58ca2613334f6a0f969efb147917d7295a5a3d433d37c97bf896bbf3ae. 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/DEW921801288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32b3106fc747b126c12d422d14448d275b4d04af74f49b92ea1b8e7c482240f. 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/QMFME2157782.