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 0x2afe4d9b46fcecb664e5757206756adf54fe766302a6a5a8bcc5e3770e831730. 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/47455c69-4e13-467f-b366-11c7375f33fa.json and https://artists.proofprofile.net/proofs/artist/47455c69-4e13-467f-b366-11c7375f33fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hải Âu 43 - Tiếng Hát Mỹ Huyền Đặc Biệt 2
Tiếng Hát Mỹ Huyền Đặc Biệt 4 (Tình Nhớ 031)
Tình khúc Bolero Duy Khánh & Mỹ Huyền: Niềm thương nhớ
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 0x8be35680687e618ba46111e6364aa5851c2cb76c27ed7095683ed42299f4c870. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM81520601.
Thành phố sau lưng - Con đường xưa em đi
Saigon Nostalgia - Sài Gòn kỷ niệm (ASIA 68)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c073ac786f1dbd73cfd4bad698693945b2b5c94f2ff52893c2059cecc078e3. 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/QZGCD1806155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf72ffce3d6206339d8a302505defc7e70d7ea938fc73f9fd0fee3465ed47a43. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGCD1806437.
Nhật Trường - Trần Thiện Thanh 2 (ASIA 61)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1926a4fe9e26ed211dacdda367bdfb8d7f942a59a5685e88935f537f5328b1c0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZGCD1806330.
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
Lá thư từ chiến trường 2: Cánh hoa thời loạn (ASIA 66)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bef596e868c94213cde99f48313d8dfcc28f3e3c54a424964faba664bfdbb1. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZGCD1806207.
Dạ Vũ Quốc tế 4: Thế giới Mùa Lễ hội (ASIA 64)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafccd2e4d13fd4c9ab3d5de02787a889fb74368efa7a538bb36c67ab1fa4b2ec. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZGCD1806246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef8f4e08c6f13ff3d31f82878e8347f3c004b25fa65569a1add6fc185e6b5b4. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZGCD1804248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc754060d869de62cb99a95263f540d3ac194d841ea21f1fea609cd9821c09aa6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZGCD1806190.
LK Đồn Vắng Chiều Xuân -Phiên Gác Đêm Xuân
Xuân thanh bình, Xuân chinh chiến, Xuân tha hương (ASIA 60)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bb74c4fefab1f412170d0fbc6d5eeb084cc82b264ead18cf63a62e014707c4. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZGCD1806353.