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 0x05e38a7d2956953e86db6b59d6d305683106839950c71d721bf0dbd4c0ddb90e. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3b32cae-8753-474c-b08a-9d7566f90789.json and https://artists.proofprofile.net/proofs/artist/f3b32cae-8753-474c-b08a-9d7566f90789.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x0038a42a291659010b5e46672a31aa5d5b83c52cb7286cf32740e74bb05a6704. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:54:57Z), 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/FR96X2594949.
Tuyển Tập Những Ca Khúc Hay Nhất Của Lưu Hương Giang
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3aa45c892ff59825df579935a87747329bc6961935f666f5adb38bd133cb43. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T13:00:24Z), 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/VNR011033287.
Đừng Ngoảnh Lại (From "Lưu Hương Giang's Library")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50a2d746f95582f6d38bf96d623500cfa6cd0951f710c78800239f9f8de0dff. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FRX452397542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc91d42a53f75358fc7ea699f7d3f4b31059fe3c4525265ad455b985ccfbab0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX452397543.
Giọt Sương Và Chiếc Lá (From "Lưu Hương Giang's Library")
Hẹn Gặp Lại Anh (From: Lưu Hương Giang's Library)
Dẫu Có Lỗi Lầm (From: Lưu Hương Giang's Library)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c7b50a9aaefb3d324bc59564dc7859987dd3f6b4ba0f6e0622b78653068646. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR2X42483708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30d09b554a18bbe99e23550d80754262749f4ba22184e47ebba066fd664fad9. 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/SGUM72301563.