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 0xa9066cc262b5de2f5a3b1c34585dff06c0daa5ca949997f7cda5d6f69f9898c3. 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/57cf0869-cab2-421d-a916-4ca14cb06d0d.json and https://artists.proofprofile.net/proofs/artist/57cf0869-cab2-421d-a916-4ca14cb06d0d.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 0x41a00e6a28bac1f0444d268709e1ff9bab0d344ee663c693b42e875ed77c48c3. 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/TWT951800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43860584786006b7462d0ae3722b5abf9c57034130df2ea1124582c8ed49ad00. 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/TWT951800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8bd1845d63065247167a7cc45a0210378d756812df9c7ded4a6edcc4a4384c. 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/TWT951800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320e9cdeb1f26ca463f5627893ddc410ea06891143596aa4ccd9ee199b6e7f46. 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/TWT951800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbd4b23fc8368012301e2f4550c5c0672eac5f01dc95de7e41528f150779b95. 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/TWT951800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8278a4e3d9bccf08d32902e54dedb319281dbbb7a0b4c87d790bd6fccf89b5e. 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/TWT952000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412625e4e18b071c8c56cb34afeca7c1cdb26fa8f4e1d857e7e76693aa35b6cb. 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/TWT952000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf26fb2a64e8c14a5394ab520fcdf08d1585d7122d246b8c50a1c0bedcf19fa. 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/TWT951600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448c4c5584594bbb4850869ce5da5533cc53698271a32d053ceff0fb9962eb5d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:28Z), 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/TWT951600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba89862a975e382d03c05f22b012fcb81165672a76faecfc71a4ddce6ed2ee3. 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/TWT951600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9ccc70edca609f66bc27a1cc1b29e91fd44f48e67afa476de0d14670829446. 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/TWT951600040.
予你的心誰來賠 (台視八點檔《美麗人生》片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622556c502a11746a265ab4302421ecd242c79670a2d3e193c449841b4329be7. 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/TWT952400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da87aecab15036f34042820bf1bf319e8b7e930bc1fc89a9d181db68a8e73d7. 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/TWT952000022.
愛·無你袂圓 (民視八點檔《多情城市》片頭曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f59933eae8c287c673eea3cc7243e20110cdac41ff48158f813986ff68152a. 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/TWT952000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64f05e6a7c4626c0212465fbc559c24d7e67df1b19cdb05a47b139b10cca6ae. 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/TWT952000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685775105ffd0eb847426d8268fec280d27afe19e070f8502d05e0cdaeb83f81. 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/TWT952000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e383004083c115f243c67c28e459ab9a53adec823d73824c0522c218f95784. 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/TWT952000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16b2404135b9201513789deee53ad9663f1170a8218620d0247f4e4337cbe7a. 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/TWT951900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7663600a11b98d6f10413f0d93d807efa1dc4adb91e124b765435738e1495650. 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/TWT951900006.
後世人 (台視八點檔《追分成功》片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b175007e52a8e9b05628c78f5c62c94de6f21fb89ced0e4052d21acb5b94fa. 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/TWT952400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068cf2f00c00faab843c1801e681cc18f2698e36bb8863a6266a49e621984385. 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/TWT952400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd605286768824764ed2fa2c45f915c613df8eb6637c2157a560bcb50bce56300. 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/TWT952400027.
假使你知影 (台視八點檔《美麗人生》片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784a6790d88956d2affac674aebeedb53a4d9100bc93bb9b7780c013ec9b7dce. 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/TWT952300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4f3bfd76be23fd70719e95cf26c0eb14014d3e5eb4e11ccace14f65e930593. 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/TWT952300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bd03dfb961ee2527ef963e4db6754120e6d5303ffc89350d9aa128b5ed4e0c. 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/TWT952200031.
必巡 (三立戲劇《含笑食堂》片尾曲/《嘉慶君遊臺灣》片頭曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9231ccf7075c6efc724a8581f954679f1f84a274871d34cd50e85a94879ae07c. 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/TWT952200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9412162c435ad203a900c024afbe4d8a1e806789339a9d5a3d0a427f008c637e. 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/TWT952400011.