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 0x89f3267b78459e423961752ea50512b11f4b6d3ba08baa39078a37ff0af10976. 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/561b1b6c-7bbe-4507-a04f-e9a686f380e6.json and https://artists.proofprofile.net/proofs/artist/561b1b6c-7bbe-4507-a04f-e9a686f380e6.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 0x272c9b2a9e6d00d550774fbd28b190b0c97b77697d7b742d39c6e48914d388b4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/BGA471911237.
Ngày Chưa Giông Bão (Theme Song From "Người Bất Tử")
Người Bất Tử (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a5795edc901d9b21407237d4a3a53a5a22505ef84ba5827077e641b56e236b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/VNA0M1844257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a5795edc901d9b21407237d4a3a53a5a22505ef84ba5827077e641b56e236b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/VNA0M1844257.
Đoá Bạch Trà (From "Gái Già Lắm Chiêu V")
Em Và Trịnh (Original Soundtrack/ Vol.2)
Lien Khuc Da Vang (Ta Thay Gi Dem Nay - Nguoi Con Gai Viet Nam - Dai Bac Ru Dem) [Em Và Trịnh Original Soundtrack]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e216e8d03ca1e13e16094ff9ce77d06a19147a841036fca3db1943a4ba0faa5. 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/USHM82265610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c12280e3a89ed2eed0d5d5876f2ddea667fef20de12ea0227d931ff199e4cd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHB2362935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181d214594720fc9fcf5810188ad2888b5dca8c2e04d3d445d2922103fc4fd09. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHB2362977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b87e44000a953bdd730b29cc9cee29aa373b93f86de51a7ca4a856b4b61b5b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAHB2362995.
Anh, Anh Ấy Hay Ai X Sa Ngã (Live Studio Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a553d8a3cfd77f3904435737e130de5f4de90aad46f77003849b5492700474. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAHB2363015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590087108e2d5f22fd0bb80bc4577f47a5dabf39266c325923a5ded34dbd5ccf. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAHB2363048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06309b7f430d5f4119657154c2866ae4b3701af8050afa2a17af830116527992. 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/VNA0M1940855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0477537ebbea4cca6b18663bf5b210a376263209bf654365c797976de97264. 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/QM48F2364703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00048e95440fd773d80566864bd00f62af4ce44f062e436ecd32ff356af9f320. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SGUM72000213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b11853fd17b708661aa2ae2c7b02bf272ec67af5d305f00ed8445684dead5f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0T2466094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a292e9a6ce6ef7fe48ab7cedaab6ce5fa7b4edb893560c48b81de5681c5a8d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0S2423453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6de6d1f84493faab3ec8078c5307583cec3b4e9b8f2202a3d0fe570d28ee3b. 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/FR10S2548584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20187447dccf2f9e7dd53be9acf76ec2c42e931348d8e42806013b9403d10139. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR10S2548588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf1a22c017b092e876ee3ae774caf2ead05b05df4c9c45d4c120f7035654a43. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0T2443009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3220ee23be157c2278310d3db54251f2d16b40817b029185fe40474afd55a008. 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/DGA0R2464953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2737e4b4a085adfeebdd7168701483c7c449d39825b511ee3e0af22201e922bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0S2490635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d683f911d653e1616b62539f112d52ae6acf3c017780b1b0a24c6baedaec0a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0Q2433284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa41ed58e0d9c722d39d80e431f23ea1ef7bb1ce41d051b08365b27d24e62a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR10S2576731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ed045998c123c36edf43a9a9a869df2a69662b771c4e220e5c268b929b45a2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0Q2414533.