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 0x3b6dcd2dc3a5566bd8670f11bdc03fff72f3b56de276ea9ae2aa191f52dc379d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77d2e229-1665-47c6-8056-3fcdeeeed3c4.json and https://artists.proofprofile.net/proofs/artist/77d2e229-1665-47c6-8056-3fcdeeeed3c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tiệc Trăng Máu (Original Motion Picture Soundtrack)
Đỉnh Mù Sương (Original Motion Picture Soundtrack)
Những Cánh Én Đầu Tiên (Original Motion Picture Soundtrack)
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 0x5e656ddc258c0a5ea817c1dafc7023d59480ed179d2f0be2f382b4af6303dc1d. 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/QZK6L2195725.
Bằng Chứng Vô Hình (Original Motion Picture Soundtrack)
Anh Thầy Ngôi Sao (Original Motion Picture Soundtrack)
Chị Chị Em Em 2 (Original Motion Picture Soundtrack)
Biệt Đội Rất Ổn (Original Motion Picture Soundtrack)
Anh Trai Yêu Quái (Original Motion Picture Soundtrack)
A Mother's Heart (From "Em Là Bà Nội Của Anh")
Cô Gái Đến Từ Hôm Qua (Original Motion Picture Soundtrack)
Em Và Trịnh (Original Motion Picture Soundtrack)
Án Mạng Lầu 4 (Original Motion Picture Soundtrack)
Móng Vuốt (Original Motion Picture Soundtrack)
Cô Dâu Hào Môn (Original Motion Picture Soundtrack)