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 0x28e56cdbf30ce45113e3502382907de4734c78f18d7c0f5d745e798441590944. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d604479f-976d-4603-b7c5-3a7d5bbaec8f.json and https://artists.proofprofile.net/proofs/artist/d604479f-976d-4603-b7c5-3a7d5bbaec8f.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 0xf16e07b54739229c1661418fd228b6d1108ee992def86b501ffe46197e52ca94. 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/HKG731554097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcacc2e41405f75f66facbdf6f16129a23572f16a4c43f5d01b5573b02d80af. 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/HKG731554302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e13f99b058a4355e6035611638bf677cf185e1f01400d11e7c808644251ffcf. 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/HKG731554740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74ff93cd64fc75b2cb87eda59411aee6c87593f898619b396e613a913464800. 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/HKG731554137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb98ecb58792b8f79c02c20cbd03c0b6ca16a2720b3449a49cba8977a2dc955. 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/HKG731556763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d33a7ce01170645a1b85a6995b98dc77988ef895b1dcf77355837733d548b0. 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/HKG731554516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697691cf5646db181bc37aa80937ada382b835e1c3dad8bc43da1c9e31f4fae5. 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/HKG731554356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2782dfdac15de4994ab93be8d2f662aecef1431b3319d2e14531c574b7950baa. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:16Z), 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/HKG731554751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cfbd157bf130c0636ec101ef0ae5557509330cca52481ab1a4a98a3127bed3. 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/HKG731554185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cc5984f04371cf4d17be9788eee25e32df6d48e4d8bc94d5e1389316f6c74f. 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/HKG731554675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ebbdd19170bc4168d541d11ce97737f0521866b8f25b6f318367932886325c. 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/HKG731554374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bd33be414f41f17f04ef7f84f37a4bebc1e8e3dd2392412aebd882c399c425. 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/HKG731554361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92c0ecf78ef9ddcafdf7e337a52e6323f29ae182c6c0dccc8bad2693ad1bb88. 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/HKG731554853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2403452ac8162cffc4e45d66c446484efaec740ed3adf22104f9d3c2901051. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG731554054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114259e0c0a12825362d134a08a7fb66f451e8771c1c9bd1877ea50e259c01c3. 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/HKG731554357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e6ebccdf83d55643d722ad0ed14f5af0d5196c6426ddf804dbd7c5bb5cb56c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG731553990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48eb3aac74600862b06818d2d5d64ef4f0a43d5ca384a6b02046f6eb0bc728e. 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/HKG731554080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe667f35dd0582a34e5748f2065a745a801fd4e63c494235ef4a5acf5014d364e. 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/HKG731554043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7b8870069f48f05e03ba7110e3bed2a97aab5eabcacfaf90b871f35b8dd99a. 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/HKG731554915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e10608914f5440f8de10f514efe3142783f27d79f049ec972a6ca543ff44c7. 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/HKG731554145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ec76710e0bc46e476790a47f05fec833fdd52736583e022afff6b08130f6b7. 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/HKG731554051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16262e69c44ca8a3776a1675cb017795969c0bf16b9ec79b2b231e395898eacd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKG731554069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49baecd9b79979455efd2dd793f1b4528a1a61f2186c6c1c1465bab2624a1bc7. 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/HKG731554078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4864450409502a2f07b1c4cccbc8b1eeb18688040e4073bbc2ec84df535b0212. 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/HKG731875595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2e17f32c3cac8500ca7c2e6a61c36c3a5960bdee5d89b212008d1b58b9ca35. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/HKG731875596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f82831ca45fac0e48a55f28af4498b14958206b5e9ddee92778325ecf7e1a9c. 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/TWD251950544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079fa3e8fd2e9b784ae9df7964830d13ce78568284ae28836cc5f359e8ef0cc9. 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/TWD251950545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b78cb566816faf9fab8a5f358090c42aa5ff7137f1b2bbf440fe3c8c3e067f. 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/CNE222100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79953d0b766d2aaea286b8ed9de30dabc2a9d7a852299cc6b6356f14fcea0417. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CNE222100126.
大型紀錄片《紫禁城》主題歌音樂專輯
千裡江山（大型紀錄片《紫禁城》主題歌）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4dd474a83666b715e10268ea29cf712d346f0b38c2978c41927590731bc712. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CNZ512100418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daa523e5e06bb87ddea95c6c0e72c9c464c1cb1e9b625daee4a835baee9cb28. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CNZ512100415.
天地龍鱗（大型紀錄片《紫禁城》主題歌）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f393dd632d131326b46217e94c0d03ef0dd603dfe5552f5164bb9a7ed7d870. 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/CNZ512100475.
電視劇《北靈少年志之大主宰》原聲帶·世界篇
一決芳華 (電視劇《北靈少年志之大主宰》主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd01a8428a5edac487c4c4c5c62e19b4b2031585349238d82d10842cd085945. 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/TWU712001305.
他們說 (電視劇《北靈少年志之大主宰》片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78433427e337e1cc5cf7b07989b2557997777c1d4c1a9ed159c8f4d945ed04b8. 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/TWU712001306.
歸人（影視劇《花琉璃軼聞》摯愛主題曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfc1154a1511663140e281783b3e840c07a90769be6096495e7a2d82c3fb0a7. 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/CNZ512200435.
不语不言（影视剧《赖猫的狮子倒影》推广曲）
潛龍勿用（大型紀錄片《紫禁城》主題歌）伴奏
潛龍勿用（大型紀錄片《紫禁城》主題歌）
我心情不太好(《我的奇怪朋友》影视剧片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fa75bd294a3d1aef6d35f863ce14f894ce4a3462f9c3c2625fdb9543577bc9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWCT52000590.
明日来信 (青年音乐文化发展计划·五四合辑)
向阳（明日来信·五四青春号召曲） (伴奏)