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 0x8ff00e4372cbd967a58f5732b98f80a28d5e670c4bc8edd11efff364f3e351d3. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f022c70-adeb-4cf6-b9a2-3e40e83da89d.json and https://artists.proofprofile.net/proofs/artist/5f022c70-adeb-4cf6-b9a2-3e40e83da89d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tuyển Tập Nhạc Ru Cho Bé Ngủ Ngon, Vol. 01 (Kids Version)
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 0xf87ae69c287c5bd5d56a00a01e49d4c72ca10123cd9a38f641d0af186562d82b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BGA472422698.
Bé Ngủ Ngon Mỗi Đêm Với Nhạc Êm Dịu - Kids Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0602a219276f01c63b0cc0d01b944d9d8da1390b3bc2c40e3bc528365f05e30. 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/BGA472422704.
Tiếng Nhạc Xoá Tan Tiếng Khóc Của Bé - Kids Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19794a56485fbf1ab265d4742cad7019cddd45f86f37345f63122130ea2be3b9. 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/BGA472422706.
Giai Điệu Nhẹ Nhàng Đưa Bé Vào Giấc Ngủ - Kids Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0151a4177f64f0c7db9c27e365da84e7c86deea7747f051111fcfdf3c4d12e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BGA472422707.
Lời Ru Ngọt Ngào Cho Bé Ngủ Ngon (Kids Version)
Nhạc Nhẹ Nhàng Ru Bé Ngủ Nhanh Chóng, Vol. 01 (Kids Version)