thumb|Karina Krysko, 2021 Karina Krysko (born May 14, 1981) is a Lithuanian singer and TV presenter, a member of the girl group 69 Danguje, with which she started her musical career.Karinai Krysko – 4
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 0x9962fe842b7c31b69250ac416cb98712b24219dc1b3ddf772c9b2849bd84e16d. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd124975-244a-4a71-875c-1da8b653c476.json and https://artists.proofprofile.net/proofs/artist/fd124975-244a-4a71-875c-1da8b653c476.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 0x22645ffe83fbe3f9eb2be6bf9c7e980208b3a1327b63202d36457027a07730db. 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/USLZJ1875152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb681b4d7f5b166266459886865455c798939eb9485733133b2505d0f363f692. 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/LTA702100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd434b85b9113b15e74173ca2fd7751ee3c8db95dd9adefc14b2ed3069ee27fef. 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/LTA702000025.
Žygimanto Augusto Ir Barboros Radvilaitės Legenda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fb721cd318c9e7d08e4bd3b6a6a345e74e49e0f230930c0cf9586baee1f014. 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/LTA701600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033f60291a97ef5cc186a6bd2bc305242be618f9edf608dbc65ea5f61cc62446. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/LTA701600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738ec9e10f0c2baeecc5d86d3e5f33247b362bf77effaf3879061115af632562. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/LTA701600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a36830b0eba8305413b86d82c4367bf285bbafed48c6777fba0d99106d51f5b. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/LTA701600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c36837e502a9d2341a678c9f871164726ff2d33176adbf9a9db8bb5d1b3ad5. 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/LTA701800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad50f025b49d9324508b5d8446bb3b22356c3bd3d67e6fa7a9300611921c3fa. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/LTA701800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed56653c9cb0d3ea4c60e0598f69118d5dcc36c182fc127146ec9505723a6fca. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTA701800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91224612edf8d4ffd7ec29c50b84ba97a38929d7a25d2cb0ba468f7fa598f299. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/LTA701800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e6ea71a8c99f514a65a614767457880f0e66bcc0b133f2246af05a3250912b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/LTA701800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20debf066024c12bb9aaa41f1b8cbe5427cfe8ec8f863ae5c0004f2914b38999. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/LTA701800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb681b4d7f5b166266459886865455c798939eb9485733133b2505d0f363f692. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/LTA702100032.