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 0x15c34459d7438143fb03e1d32e80adb42c91f5d45f26c2ca274843b0ccda3d44. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72c9f7b5-4615-45eb-b067-e666b7f8ef6b.json and https://artists.proofprofile.net/proofs/artist/72c9f7b5-4615-45eb-b067-e666b7f8ef6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tiếng hát Như Mai đặc biệt 91 (Tuổi Đá Buồn)
LK 2: Chiều một mình qua phố - Áo lụa Hà Đông - Nếu ta đừng quên nhau - Nếu có nhớ đến - Sầu đông - Tình đẹp xót xa - Tình là sợi tơ
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 0x761835c88d97eb33e14d71fefaa20e9e696ae4407ca18254c7599edf76301c85. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZGCD1800334.
Như Mai Thánh Ca (Giọt Lệ Trong Lời Kinh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37125c0dacde58d0a2e0d568284b380f1fc77a8b59e2ecba330ea07ed5bffada. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USJ3V1141802.
Cuối Cùng Cho Một Tình Yêu (1989) [Remastered]
Đêm Thấy Ta Là Thác Đổ (1989) [Remastered]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13169ca2b9385c5face44a506cc2e308def3532e4c80bf8b881d291e3cdca965. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGCD1801427.