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 0xc553ab791f428154cad1234920fb71f56436de17575c8ab0f290ff65824c2a9b. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4131cd38-1b55-4832-ae67-23ccd876fc04.json and https://artists.proofprofile.net/proofs/artist/4131cd38-1b55-4832-ae67-23ccd876fc04.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 0x0faa46a15de5eeb14be768f6c4b1f71626af53ac4222f55f3d63ed90cddbf32b. 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/TWDK52405001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257383a1f64229c0da9259250151539468c1cef12c85dd07d6d86f3af6f6ee54. 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/TWDK52405003.
完美表現 - 電視劇《在暴雪時分》片尾曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafeed65368cf8f88585d81e31c67c88d96d1e09938bf94fbf418cf4d9c080600. 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/TWDK52405005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebadc28cb0daeee470681834c2443a4d7b4df1a26935c238361001f20068de2a. 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/TWDK52405007.
在暴雪時分 - 電視劇《在暴雪時分》插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3e8dc809dd33fabc680f6f133e4bb5e4d3888a32e845a1ad6c67dd541f9c0e. 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/TWDK52405009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51444b7c23c1d23fa2445a4110ad8367d0f6eee6dbf02ace8645aa49ff5745e. 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/TWDK52405011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199ac29362ff4ae84881a83ecf9d2e58c94b86420321252415fb30567087009c. 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/TWDK52405013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89f7e371e44d6709afb76585bb530612dae39ed8bfebe58821725717dccf94a. 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/TWDK52405015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb750973904b3ba88f86ce52bf0908d8e910eded5619b9df79854f40ddddff3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TWDK52405017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48d0371ac6393b44b08e7730945e414d9427599fb61f0c70892904a71db5a05. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/TWDK52405002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa795bf86d11b47cbf758df3526bb1a3679d7d4307502e1f1e0f785d6f8330f07. 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/TWDK52405004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe1e9cf2e1e8d555516a827c876d2904fa638ac8146ac4c85d921eae60af597. 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/TWDK52405006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3272a0eb0858df178210a514db5bcb88be8db4ff4441eb991fa59d81540e583e. 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/TWDK52405008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f63a261158f81935a75d6b1bf26d8a88bb67f5b818520ef20efb2724465ee0. 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/TWDK52405010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4f82351b28604e25c861d67de797c07541c71e80c51d9bdeff56c104bb71c1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TWDK52405012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7af47e51cd3982a6f36b599c3ad49feac57d6d530c09a1067a7eaf6afd01d6f. 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/TWDK52405014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d03cb33302e660de77dc4eb61030df84625579c99ab34f8028db913845cf96. 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/TWDK52405016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aa2f565da7c53470bc787cde45e37682aa50332673bfd8d8c3ab25c7a153c6. 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/TWDK52405018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebadc28cb0daeee470681834c2443a4d7b4df1a26935c238361001f20068de2a. 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/TWDK52405007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3272a0eb0858df178210a514db5bcb88be8db4ff4441eb991fa59d81540e583e. 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/TWDK52405008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb86fe04774e7009bb1a619736eaa1f9e372ce49ce2e2e88097349ee3f2e27e7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CNZ632400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7812e713c7fe95b9ea7c9390250639a952f937877aaa225dd8e8ee2cbb14e6. 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/CNZ882301480.
心愛的人 (影視劇《絕配酥心唐》主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc1cd21b54ad0f917043b87ff75d7c539c2a38be4b0f14cad0cc849f00d95fc. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/CNZ842300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb84bfde662033c7df37e5ca96b47b532b8da6078c889d117b9b94e97d4fc7ff. 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/CNZ512200424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381ebd09677a541bba4afd31cb213ff53386c88283a8a043de3c162620ae893d. 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/CNZ512200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7195ea0c82a605af36bbf172d792d13f1e9c36a76508da41990680b9e8e3afb. 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/CNZ842300059.