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 0xdd003c9e347ee9b0164319689776efaa48e0868409bf40c45238d9702c1865f1. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/412d743d-6443-4a4b-92ae-79978e74d37f.json and https://artists.proofprofile.net/proofs/artist/412d743d-6443-4a4b-92ae-79978e74d37f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Xuân Hạ Thu Đông, rồi lại Xuân (Tập 5,6)
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 0xa8c1716a0f8207d7e0d88a02624c6568c0b74d51775a8bc60bd6d59b5c446acb. 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/VNA0M1912386.
Sao Anh Chưa Về Nhà (feat. Hứa Kim Tuyền)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb3c10f4e1428b9b3ba9bcf74f334a625f6a8c52f1529e5bcfcbf496a2992f. 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/VNA0M1912389.
Cánh Hoa Tàn (Theme Song From "Mẹ Chồng")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f26b9b345a71ca46cc72c2fceef3afc71c202dd7c53b070459dd169d4dd2f7a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/VNA0M1912577.
Một Ngày Hay Trăm Năm (Theme Song From "100 Ngày Bên Em")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6804624aebc6eaf5d77f264075e6180fe500911ea7c43f992e163c81947b006. 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/VNA0M1912579.
Giấc Mơ Ngày Xưa (Theme Song From "Cổng Mặt Trời")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778ed10f6c55bb7f9752a0b71cc2b5b682eca250ec6501cdf2c4aff19045a96d. 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/VNA0M1912581.
Yêu Là Tha Thu (Theme Song From "Em Chưa 18")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85313b66fdb905548ded169115a25cc757f25472952b10feb669efcaf282940c. 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/VNA0M1912582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0561372c780858cb301c066b3e9148ba2d1389efaec40a725996763b0395c3. 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/VNA0M1912892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546d937919dd0cfe80752f715092be4e9e49987f1fa4a4e50a8cf26cfba085f2. 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/VNA0M1912894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02bdb0a0e919463b6fa8d71a63d6a44f808d7d58fa4b4d22637be13173313a5. 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/VNA0M1912895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fb2c406d594abd949fb57b5072b3c63b3c6751df2043ed712fe274d8ebb903. 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/VNA0M1913033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0561372c780858cb301c066b3e9148ba2d1389efaec40a725996763b0395c3. 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/VNA0M1912892.