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 0x066d66f3df6c17220531a965480227c56a6776445efb502bae10e68053e249bb. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d4a6cb4-47c7-4965-8197-0c3ce73fc84e.json and https://artists.proofprofile.net/proofs/artist/4d4a6cb4-47c7-4965-8197-0c3ce73fc84e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
巾帼英雄（新编程派京剧《穆桂英再挂帅》印象音乐大碟）
新编程派京剧《穆桂英再挂帅》印象音乐大碟
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 0x3a20aee1683e2bd096c1d6345200f6d92efac36ffe3430868ce3e5b556b5b557. 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/HKG732274401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ff2b2c8dd9a66fdb8dda3a96558556ad0684bbffcd45bcdb418620476f6ae0. 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/HKG732265254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5308c91a44b70a37a32dfdc55e2ceefce51e812040d2f8384a3c5833c0d45272. 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/HKG732265255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23ea6ede35051b8db41b3b97114583b3f7bc940ce143a564c4f6e48fadd6d44. 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/HKG732276397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aea7c3286a6547f7d8d5f0ac0cb871780ac5c20942784345e1972e408be8381. 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/HKG732265321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa463fdda13cece442b6c83b5e39fbfd7ce31f23bcf458b94c1630e580f112f04. 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/QZZ972339393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b98794dff9f648a4b665c066052a5e6e13e37c065fd87f45a197dc535b545f. 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/HKG732291881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237c19984096bbd065f588c958439ce7926947f673c4b922b8412f14a177d259. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/HKG732265351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8834d01da4b38bb390945682cf55ed4b7c23d489ee1488618fd6e26c090b881. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKG732265277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa738dd0c759d8a5ccbd23f924afddef1c527a74a2ed1f6c3a4f6866e805c3325. 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/HKG732265295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e01ba143122ea92b17aaf9f7edd8571d2e85e1cad9e98378037c0f509d692f7. 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/HKG732265296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fe1c1ff3bdc2d1f6a7f6cffb5bef489af13bc4dfb3f46c7aa64c192c859181. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKG732406703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563a929b9117b7d76c46eeb602d20ff9334889b194034a35f295ea36ac460541. 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/HKG732406748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a0dd63808386bdea63a47096d1b4f94e89c8b7e33ae09957c7e4c701116cf0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKG732319319.