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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ecf7a339b3241530d87af2a7b1ac792d1f0b56c2ca924895f49994ca8e3dce. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e1b6ff4-3c69-4288-9ce0-f4280bf31d0e.json and https://artists.proofprofile.net/proofs/artist/5e1b6ff4-3c69-4288-9ce0-f4280bf31d0e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed10338192386c41e55f1a03ee0562fef8e2e1811ae0d390e7a4c96a7a6ab00. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/HKG732004794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3951b6fa705db4109fafae372e479fc69f72fe714934cae734801bfa2553b26d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:09:36Z), 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/HKG732004797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdd4d4704ddffd373e0191e107467a89e76001734355bee8c8fef3d4f579eb4. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/HKG732004798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c77f8af248a378193936dff5579bde637fec85c1af6cb62b2027b7cd543121. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:26:43Z), 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/HKG731907537.
朝暮雪（《和平精英》梦寻西湖时装印象曲）
百战成诗2023 - 游戏《王者荣耀》113英雄群像献礼歌
百战成诗2023 (游戏《王者荣耀》113英雄群像献礼歌)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11f52604b461fce667907c0580cc217b263c181596870f5d58597d7032244b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR10S2382129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa1d0af48ef9eb91ea292ed95da3b7fb9648faafe8e1c09b17d35caa289c838. 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/HKG732120892.
百战成诗2023 - ——王者荣耀·113英雄群像献礼歌伴奏
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f8c1400293e80ffa89265d15999e53d774a724e1e8a3b5dba8b87abf2e69bc. 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/FR10S2382130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84867701a8c71b3d3dc7cfe4b6acba50ff805c67c9be9f8257d7d6ed1deb2bd8. 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/FR96X2257703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5298cb82a67377cd18b5664bcbf1663486cac07595a43f633b480adbbe3693. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKG731616928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a804125d668aa5ce9062fef60e29343a17ffb088846d0cb699c36c8b65e7f51. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HKG732158532.
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