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 0x7a715e58fb062bb951f32cee365dbbacb4b215e85a8ed5795c00a0ec56aec6bb. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a690e5ff-e85c-457b-83ff-f3b01b980ee9.json and https://artists.proofprofile.net/proofs/artist/a690e5ff-e85c-457b-83ff-f3b01b980ee9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
如梦尘烟（电视剧《火烧阿房宫》片尾曲） - 电视剧《火烧阿房宫》片尾曲
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 0xc8daf7ed1c084b7780e57401a3b5c9196128de917fd31bde57401c0269912dab. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZZ972364861.
芙蓉愿（电视剧《游龙惊凤》主题曲） - 电视剧《游龙惊凤》主题曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c01fd14c4bac225717586ef8f069e9e97faa51dd70ebeb319676de7287f82b4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZZ972364862.
新水调歌头（电视剧《香帅传奇》片尾歌） - 电视剧《香帅传奇》片尾歌
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0ea342ef53073eecd3cf50fed69cbb5deb00eb6dc5f0f8b54ca43211984910. 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/QZZ972364863.
秋来秋去（电视剧《断掌顺娘》主题曲） - 电视剧《断掌顺娘》主题曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae14c51b341e80394061c1839c817d62298e3b96f78a13272fa9ad47afb1266. 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/QZZ972364864.
相思（电视剧《断掌顺娘》片尾曲） - 电视剧《断掌顺娘》片尾曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4ea021d64c6102784be7af722456605a8810548efe63505d65be95e59b7af7. 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/QZZ972364865.
尘香花尽（电视剧《梁红玉》主题曲） - 电视剧《梁红玉》主题曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2660c929fec865f6a6fde440d7ded686bfa46cb483a98c3aebfa2ad4074248. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZZ972364866.