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 0x6c5cd9b4bc97b20e2b2e0da13e9a42a7a753fb876427bf4d395d33d6e95af0df. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44c41176-525f-4a0f-8fe7-6a31b4312d0b.json and https://artists.proofprofile.net/proofs/artist/44c41176-525f-4a0f-8fe7-6a31b4312d0b.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 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 0x0d46cf1bfa5437ed65452fc9d534f7e516ebd79708167ccf454593e6f84eb5c9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CNZ842300750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219ab7d7760a6319c655c65e9a4bf414a9f316c9f4b49e9a477e642c59e11f17. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CNZ842300746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5df0fe9271a948ffdd89fb883d4ac5ef65cd50b77338f45e6ffb0f9d7c938c. 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/CNZ842300752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2012155f0ad93e6f49d9db0a1dc711da05bf23c80cc48dd2b030b5a99bbad92e. 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/CNZ842300756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12529fcb86b8115e9ea4b111fa4b1123a990dba1607044ec06e3b85aca05349f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CNZ842300753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c56f25cca5e92d84d6255dad213d2b6e648cc31ad8ece7f09ec74bc2a5dd465. 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/CNZ842300745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a1e88857458b2d84cf5f211156209e3e253939f2a3a33a78964050fc88f7a8. 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/CNZ842300748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf33679c7cc498daf4853057b313e96b258f88f94e24f15155a7236f132ced3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CNZ842300747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8658b744d8958c1ec4213588db0c6a0e49e567823df8df32afa55242374806. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ842400329.
小诗句（《大梦归离》影视剧片尾曲） - 人声伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545cfbe53f38a5e40fb2cd422c004d34d01357029b60f3629e47817abfddc504. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ842400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c928822518dfbfa778d2bd39dccd2e63fa6b9479ad8ae7ff0ca3a2b20dc8bee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG732429668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c56f25cca5e92d84d6255dad213d2b6e648cc31ad8ece7f09ec74bc2a5dd465. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ842300745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cea0b944ad236ae0bb2889068c5448bdaf7d4fca7e564924cef82772807c810. 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/CNZ842300757.
花儿与少年 - 《花儿与少年 第六季》综艺同名主题曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ddb239fdc94fea30ddd58c27aff7f38ceded3da3f840fd957d681e0057dc34. 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/QNSM12401161.
不念不響（《大夢歸離》影視劇卓翼宸·人物曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b69774960253ddaad14e7096295b52c84ab7259e4557b77be611e340e86f2a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWCT52438323.
斷尾鳥（《大夢歸離》影視劇宸玖·同行曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf2fb123c9e212e083adbf8c80b036b9668b3c0495cf68b916b2ea07a49d747. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWCT52438324.
不念不響（《大夢歸離》影視劇卓翼宸·人物曲） - 人聲伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15ca165ba7335398ae83d1e1e5a86e0a2f9a50c76fe72332c007b7ab7130ffc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWCT52438330.
斷尾鳥（《大夢歸離》影視劇宸玖·同行曲） - 人聲伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecef10858e931c50861f645a00e7c03d7a9cf2ce5624185269b292b4e4a02a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWCT52438331.
小詩句（《大夢歸離》影視劇片尾曲） - 人聲伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545cfbe53f38a5e40fb2cd422c004d34d01357029b60f3629e47817abfddc504. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CNZ842400328.