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 0x23e1c15c11ab0dea9501a44a26dc438d6991fb403c24502192de0215d22d51e2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e2358ba-d557-45ff-9c5f-68cb7c2c8dca.json and https://artists.proofprofile.net/proofs/artist/8e2358ba-d557-45ff-9c5f-68cb7c2c8dca.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eab7fb66b6681adfe222fbf9451565678c2951b0cd4e3a9f8531aa8c6e2cd79. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:31Z), 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/FR96X2576327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee41126b8de2de2135773b9f1c910beeeb745eabaf1cd0f527362d602ad6437. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/FR96X2576337.
Song ca Dương Hồng Loan - Huỳnh Nguyễn Công Bằng
Những Bài Hát Song Ca Của Nguyễn Hồng Loan Và Quách Thành Danh
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff40322539523d773b56d3ed08c4c288f55427b9b8b2378e66938196a7123a8a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:53:30Z), 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/DGA052081840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3820494c87f4a23bd5eb131be63afa3cacd526a6050528d4c10c16820503a075. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:21:22Z), 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/DGA052081844.
Tuyển Tập Song Ca Dương Hồng Loan Và Lâm Bảo Phi
Vol 1 Tuyet Pham Song Ca - Chuyen Buon Tinh Yeu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06b589aeef497f56cdae353ef81d8d9794f2498fa96e7a0d28aefccb3a189a9. 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/QM4TW1892311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7909e68ad1ee2c846fc722bdf301ba201d86407dc438976b66d1a26c1616548c. 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/QM4TW1893065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6c1b6da605ad262178bba9572a934457addd791d80544e753d3a0cf2ab6d2f. 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/QM4TW1893070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9205df80eb334fd1eb04cade107032c04997e7322983f7492e4f56db9d135b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QM4TW1893072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd54a98c833037680149f6cf5e3544cdd2080fc5da9124fd46011672818cdad. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:58:15Z), 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/QM4TW1862926.
Dương Hồng Loan Với Những Tuyệt Phẩm Bắc Sơn
Tuyển Tập Bài Hát Hit Của Dương Hồng Loan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bab908a9ba5dbfc7c4df9d2b0553b5f2f754aa07da62321c1b1b2d6061bd7da. 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/FR96X2576305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8d3deeb0d69768e9d669f5036fc81b721f811c8a83919f7c9b0508a0e2210b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR10S2307454.
Liên Khúc Mai Lỡ Hai Mình Xa Nhau, Đừng Nói Xa Nhau
Liên Khúc Nắng Đẹp Miền Nam, Khúc Ca Ngày Mùa
Liên Khúc Ngẫu Hứng Lý Qua Cầu, Mấy Nhịp Cầu Tre
Liên Khúc Bolero Trữ Tình Dương Hồng Loan
Nhạc Trữ Trình Quê Hương Dương Hồng Loan
Tuyệt Phẩm Nhạc Trữ Tình Dương Hồng Loan
Tuyển Tập Các Ca Khúc Trữ Tình Dương Hồng Loan
Lý Mừng Xuân (Lý Qua Cầu - Dân Ca Nam Bộ)
Phận Bạc (Liveshow Thương Quá Việt Nam 9)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1513ff6acefe61af05c45a3c7f94d24d3a329161918fc3e80970bf76a457b852. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QM4TW2446069.
Lối Thu Xưa (Liveshow Thương Quá Việt Nam 8)
Làm Sao Quên (Liveshow Thương Quá Việt Nam)
Sầu Lẻ Bóng 2 (Liveshow Thương Quá Việt Nam)
Liên Khúc Đêm Cuối (Liveshow Thương Quá Việt Nam)
Ngày Buồn (Liveshow Thương Quá Việt Nam)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9992b9be8cfe0741538b4618d3d913b0df3936912910b59ebef3ab4a91f60a3f. 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/QM4TW2454929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832ceb1d55ba8703e721ba3424ead3a969f20f7331563c3d450481fa0ec07315. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM4TW2454938.
Rạng Đông Tuyển Tập 12 (Dương Hồng Loan Vol. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0415064f80ba4fac5ca04d740bd89fb5fc7a282e1e6e2c0b07e23e3bf8366676. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/VNA0F2400355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0fd2a3787d7952f2e4290765c2d44342629c9d7aeeb742eeabfb87793ccfc5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:02:08Z), 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/VNR011051886.
Chiều Qua Phà Hậu Giang (feat. Lưu Chí Vỹ)
Liên Khúc Lời Yêu Thương - Trái Ổi Xanh (feat. Hoàng Kim Long)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e24325c999773d104ccd41619a0a42b50b5ace8ec74a00b39aaf555781fd501. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/VNA0F2111505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd622ec38241314bbf7e618050954bd34e05593e53d53e384000a43a514c038. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/VNA0F2312097.
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