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 0x3aa5c12b7af52bce0777e381b8a59bee190f8819fcf8e69c4549197a43361efb. 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/61355b30-e476-4fec-99ac-bf7a9849692a.json and https://artists.proofprofile.net/proofs/artist/61355b30-e476-4fec-99ac-bf7a9849692a.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 0xfa9faf1e724bc0d2af83af11413c3b44c2d6c5ab1ea8c9df7d0ccfe3037a73a9. 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/FRX452293863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277ef94bb28849ac655a94e61ac2f8320020bef47a46b365aa82c2981fbd2283. 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/FRX452293865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886ae8df5c87302a9487345f426aaa521c36ce717fcecb5da555ccb5b8a81731. 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/FRX452293866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597f27543bfb8efefe99e019ac2fd58f5ac782e3dd912dc4cfdcf0b5f47f405f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:57Z), 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/FRX452293868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e00e156b2056492fe29fce00373cdb8e8f502084e311a070a13888382cf1b5. 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/FRX452293870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38656440e89204c7ac6dff608eb67f27560400d3591383cbc485aa526ee8b8da. 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/FRX452293871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0a8408a230c94bdf2288408bde529abd34bfeec8b849aedfba622d4de8e350. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:07Z), 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/FRX452293872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa811dce342f2353571ae3528746947e13104e3862144b662366bb637488f5694. 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/FRX452293874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7cdeddab1c555e19a09644cd4be5f0790c4b9d4613538cd2c5e76c1fa2918c. 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/FRX452293875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd237c124940112c0cf4e87fb3044b9464aaa3674c32a5f9c669ce38cb7220034. 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/CNF202100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac1e9fe914497f88d819c72abdbfe1b1de32f3b405b72b3f1ac476b009e8819. 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/CNA761800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae60b1cda97fa9242d6df6b1862c516cee9a5446641091db1a29e48cb7dea29c. 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/CNA761800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44e3c938612732f189e94a03ef01eadf5717be49709476f7b3c28f274c88832. 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/CNA761800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081cb2ecb1f43c48fc5f4d73d36ad28c8dd59f21d25d97346a2a02d269cbf900. 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/HKG732236100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb7d97786992c211ddc8a3b9d95609c71ea23c76479373fdb74d16f273a2758. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:41:19Z), 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/HKG732236101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5f66ec6a6edff49be9fc021a0156c9df8574eabdb1c0bf68c459c697060187. 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/HKG732236105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2618575fe85e60c3c1c9313cd54ac9fa08ab309e0b4054c0aa990306673df9e5. 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/HKG732236108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa047cf838de50300ae1d731d8a28d749b219f31d5fa5755885e037b70666af1d. 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/HKG732235758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4269ecdf6b49b5d8f12c0018d9c25469ba39b1b5f02d1ccabbf3bc0b9c5c20. 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/HKG732235759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62763ab906ac361607d94f36e9cc526d36e1d7041fdc4ff92c321f029c5336f8. 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/HKG732235760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c814f07f9bbe983d9ed77bc22404557a58921a02cc3bced872a4a30a467d6d9. 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/HKG732235762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789bf55396accbdfb434a38e2363247ec65961bc494f29c81c85aefd5b431396. 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/HKG732235764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e81e4ff8f5d663e54f23936c6bf3c0985ab6fc0182a2c7f6be4136da12005d0. 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/HKG732236746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adcf9e53401df1c206b7b55173931bafc9bde28f624c7aca834c3afbf065265. 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/HKG732236756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d7caac15ae0e48d6f07f63e1ee4e205dfccff21d4071f61087d112b288e277. 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/HKG732235932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e311cb7f07de3f543a3d815b8a228aed0b961cdd2dfee86ae613a0c6b3b3f0. 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/HKG732235936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402b7c68de5e99cfb1f9a337364456d07f41ff2bb70e9bb224460121cc15e6ac. 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/HKG732235941.
花样年华（江苏卫视《花样年华 2》主题曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bdbdb633f241916a3735b746f7bc4d8648a2ded9ac70c5883fd44f0a57e0ac. 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/TWU711904696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292d9cf5549b34d3728ef3557e16541f3417742deb89800fd531eccf51f5afc8. 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/HKE022303316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90226d642320e45baf5490ee526bd2ef95e2ddc41df624eb8c7a552baf1dadb. 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/HKE022303317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd508458d90d643e55d664df688dd08415cbcd6d6ef280b9ef3ddb797e00c864f. 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/HKE022303318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0a5b87be7e785cf20cbfe9fba649bc82714ac0295bf42e6037c7dd7efd5bcd. 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/HKE022303319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103e53f1862428f47d3334310327f9e45872a4f3a6c8be0bb270707a3ac42164. 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/HKE022303320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03ffd4d8d51879c6aa2aff3797f6e30c73d61453e05dc8387f0bd12f0d86c79. 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/HKE022303321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f46504ffd7aa764aba45043d19709a0b39bf4f4082204bb36992b26dd7c1b5d. 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/HKE022303322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7331aa0df016ea2fc68853a9839e36b4a866a33cf212d15c02d0f7c478142e. 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/HKE022303323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5836e20122b69dd27b0655d98d63f20458358c375a169c5706647e00de94dc. 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/HKE022303324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5592f4f85d6056ee610d146e3ae0792a36ca35a4445f19811845a47a6d2dda80. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKE022303325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac1e9fe914497f88d819c72abdbfe1b1de32f3b405b72b3f1ac476b009e8819. 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/CNA761800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae60b1cda97fa9242d6df6b1862c516cee9a5446641091db1a29e48cb7dea29c. 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/CNA761800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995797cabd5062f9ce85d8c126e0c3448626fd61d182222ec11d4e1cc975cd60. 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/HKG732236812.