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 0x06f04f5a6354452eeeb160a482a765a24fcea6689822ff9944a19277c6936604. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99afcd97-2a19-46a8-ae15-7cbd9709ec38.json and https://artists.proofprofile.net/proofs/artist/99afcd97-2a19-46a8-ae15-7cbd9709ec38.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 0x2795f5a667045eef314bf5abeb26704b8eca8d558a29f6dd66b1ef5ce0e4735c. 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/HKD012301082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebda474015f431a46b3576f81262449b5fc320662b059c510a3509c0db2c8636. 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/HKD012301083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ac1e16e9d984cd64a840e506f993f8977040563f30578f74d8d17ae85e8a7f. 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/CNUM72500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619d844383829e2ea4b0e0e31c922f6727bad5c0fcc7991d6e2ad85a252b5f40. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CNUM72500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d8b9f4bb7032c919cd262ccd0ab04bab0039ba8709b3178ecba4df32cb7634. 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/CNUM72500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee861f824539a7646d91369655857bd7faec1f01ba92edb7dbc14ae732ac50f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CNUM72500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755a4645c1cafdb520b0df9a34d13b2109a03d2eb992d86a3d13645d116b7be1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CNUM72500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ba9b1d7a7063205cbed6719b172144e87c4dd73b3d02e06c1fa50590a1f72d. 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/CNUM72500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b361260a1d9fe41e7ef83b8a7019ae9f9000961f8fbc215067692348c89e6e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CNUM72500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c818306a29c8adac8211d7423077fa24d4024a70f7422e6e867723f13e6821. 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/HKG731593553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230038d653f30307b3bdec050acf0d73b82787e35971faa1d2c588c2ad813e8b. 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/QZXLZ2312331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929fa7fc27af2333d4039e77919ee6bc88cd41363c19504566317c9eb950c0b2. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZXLZ2312332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d14f29e07067a71a60e232738b4054ae925679cf584cec17c850c8c445ece0. 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/QZXLZ2312333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58207a7c28ef0f11d1d9eb672b78b7270453f301301f78309011f606d4e8d6b0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZXLZ2312334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e45da7007d54f26b869339fb2ab85cda8c8b97c99162f6fbc498283d326d36. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZXLZ2312336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4627aca26d0d4956340bd24498931390ba897c21f668c1f3a048a2ace632e896. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZXLZ2312337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7368c131c30fe12fc49e58608f2fe29551c541b3cb1187593a4f26716cb2d8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZXLZ2312364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fe19b9dc53055027cc768902f2d30faf905b294d5eed386b90e224d53933f7. 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/QZXLZ2312366.
《恰是百年风华》——河南省庆祝中国共产党成立100 周年文艺演出
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb378d5443392310100c2ae6b07f71d05364a20097e179e6550e3e3a792c241b6. 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/HKG732126886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b54cb831357981733543940608a177d79b916d76aba45e35c2d3fb4adce5503. 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/HKG732126887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8961044fb56463883122eb83099abc4899070da19c72e2370c9f0857cb8bfe3e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKG732126888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418b7398c485af883debbf938dec3767644e9e4cd7c8818020bb487389bcfead. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKG732126890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca329d35ee39712750004fb91565a412139bbf8e628383a9b34f5b8f0e58d43. 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/HKG732126891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa052b889d8281625c6df41b352acdd860ccd34b6ae853df26e325bcced251de2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732126892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e034d332c8a921d4a55218ecf617a712aa533e2e14e169ff161693cba04c5a. 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/HKG732126897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d6dc9217beb3d5c500c5e329baa8000913b1ce60211d47b15e0fd20b254353. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/HKG732126900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21db4b1401a9cb2ad91325061c7323edcb68bcf5ce49f26fb42921b8240742ba. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKG732126901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4a849d7a1879fca46be6a9c27983bc6e72d1c26257f31cd10a28a82e7fa707. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKG732126903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc964c7a54910a680bdaed27d389e630efeb38038cd13a2aa2ba968a0df6d7ee2. 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/HKG732126904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4f71298a266113bce6c0017aef45f6027b7a0c96f3e91373a1be0cee3df9a5. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/HKG732126905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ac6002485db51a07a0980d34d9f196a695c138126039e867e26a0d711a5f5f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732152804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce460d54289269f54be1b7e8e2aeaf74a18a435d22cac66a969b7483c62fd0cd. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/HKG732152811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e4d26a7fa4b3e91b8a5cfb6b6656f0453f5ef4834d81c27f26452463871d01. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732152812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d010419faaa6aa7998a2b394bf91017b2d3d78f2a1095b937facd2808ed6e2. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/HKG732152813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5758ef48bbe20da8a513b6e203c14de11211a3524f9b661a564c81d670e22a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732152819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5585cf569e6e92217e4c4311a03bc7d461107ff54f5185820d665edf3c2df45. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/HKG732152821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7eb7b94ee564ab649f56f434942191e75008ec148e27eebf8d94332ef98754. 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/CN2DY2500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd46017d10dd7f2613cc3af6f048893d1c49f314d863c9568a7045fb27a1d83. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CN2DY2500108.