1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973dc5c28b28bed7b4c2a7f8f19bb025f078c4dad4fd672fec41f4afa864b26b. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dff6ba76-72b6-4826-9801-f06faba4b30b.json and https://artists.proofprofile.net/proofs/artist/dff6ba76-72b6-4826-9801-f06faba4b30b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
天冬花儿开（四川内江东兴城市形象歌曲）
风说你曾回来过（内江东兴城市形象歌曲）
美丽隆昌我的家 - 四川隆昌城市形象歌曲版
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 → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba511f65db743a36a08be453cc3309cb8a5f81abc2a272bb13c5e2c94bac6763. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX762276267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a169af447195fe650bc1ee521e4c1acdf7d3c3a383af12a0f6eba99ed198d6. 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/CNF121901404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45504a4a770934f65f6ffe9a358713685b13f67af84c3b4a0497d950755d3f8f. 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/HKG731790760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ba67378be4778a765837e51dfbe13314615fe6653a5641a162a32267573c15. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG731790771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc582f43a25577bc7b4fc54c26a017d4ae9a27e26aad9b6b2792391fa0a5694. 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/HKG731792745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a11d5ea0cd2d48cd1ce2ab50162fa4116e80a8235d7c28cbe3f258526e21f1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG731792746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7d025f8ee328b4c9971f6ff8987b8283bb4ef69b6665f0d7539c08038ea0c2. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/HKG731790811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21458f82334d182cf3fc8fcf629cba3177201b6b915ae821822b32989fcc6808. 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/HKG731790813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a540c7d71f4970d52d04562b4f252f599406e22c71b867238d9449f5cbf6d37. 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/HKG732364832.
广州南沙城市形象宣传优秀原创作品
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ee19c4fdf2ee4017b3b31a9e9fa52f9f94d4632c69741d38282d83ff339b5e. 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/DGA082392695.
广州市越秀区少年宫小云雀合唱团
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa386b9109f64a5a40dca6aa08ec9e1c240364958120209019d6872495cfaa380. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR10S2265700.