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 0xda6687e762077f97abd3f2b8da4d183eb5beb2e76e1beb5d2d25372ee6fe3097. 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/eb0528f9-cd1f-4562-91d1-a7568a8c8fb1.json and https://artists.proofprofile.net/proofs/artist/eb0528f9-cd1f-4562-91d1-a7568a8c8fb1.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 0x6f15586b3c82dae610088e4597c0df7dc920e94536db9861a6d634cf4c509283. 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/TWDL72101429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa815f2e178278da73318963da44cb7354524cce2e3f45d4cb9e7f75e7a9c09f. 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/TWDL72101431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c22e367b4523d1075697f26b699b54145056019977043d980a92ba821fc0434. 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/TWDL72101432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc009d3c884e99b44fb241fac74f9b88ee40e7fc309723ef1bd05f61f8c4c3ed1. 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/TWDL72101361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44dd4c810c7e3d2ea49da69275f7447aa801b91ffbfd0b3137070057a3b4a51. 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/TWDL72101368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58bb78dce2dd2093820f02cba6f33b161b3f7c01ecab6d326d4323fb929cb51. 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/TWDL72101395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefe4418db984d5876fbcd885d684d99bf38a5c4c16e523d7b3a9440d0da6ea6. 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/TWDL72401611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf746e6d1e0285ebbc9429b5acceb189ada6dc02cdaba072136be8af1c499b2ce. 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/TWDL72400639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051edc6b36dd9bbc9085d17804a8730a5506f46bdc4d40def1da8def9f8aa2ea. 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/TWDL72400426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedad6ec4ba713264f86488a50dd77b33f5af78731ae2cfba2b6252b60b3f80d. 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/TWDL72400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36aa1932deb5b0f5000eebe709a0d34883772717d682313c956746ac77a834e. 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/HKG731674079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4061648e6288c335ec6b7eb0ae2de44272540eea721d9f38b3bccd2c148f62b3. 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/TWDL72307029.
惟愛不改（《百變馬丁怪獸大作戰》電影主題曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53950984826790c2100bc5bbebd80e0f3b7c528e2c1791dc347f4d32a02fce0. 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/TWDL72307051.
我知道遠方（網劇《何加加的桃花源記》主題曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfb4f5acf69354ac1055bcdfa7736e152e9c54317cfaf6eca40c93543b0d109. 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/TWDL72204375.
心動不可恥還很可愛 網劇原聲大碟
依蘭愛情故事（《依蘭愛情故事》電影主題曲）
最好的自己（電影《蜜月酒店殺人事件》主題曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87b635c3a70a9f8373cd21a9e596fb05346f9e38844243adc9a289fa5668658. 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/TWDL72109990.