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 0x051301c5b1592f181ce6100a695580169a200014def331ff82d1f16ffc125a42. 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/69019d27-c651-427a-8ff2-666f89d9697e.json and https://artists.proofprofile.net/proofs/artist/69019d27-c651-427a-8ff2-666f89d9697e.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 0x20c167b2d14a4be674b3857488f7da9ad8b27d15c61085553a72bcdf67ecb5bd. 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/FRX201996444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ca209269d122aa52c1a55549b7bffe28b0fce196a7693df86dc6f1df58b738. 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/FRX201996447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4d988dc3336c0a29ada892b3f638020c1605fa09196193973f424e5234cad3. 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/FRX201996448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213222c57dbc470b254f49c9566129d8fab83f6d54e9d91783c0f01866afab6e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:38:19Z), 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/HKG732155286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45f47d52f2fdedfe32b4289d79e299729e5060b44bcf852f665c45b0ae1496e. 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/HKG732155289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50373a4bd898f4f8ca7e0f79dcdcd038a7042d1c4cb37a9c6065f132661af37. 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/HKG732155381.
愿得一人心（电视剧《最美的时光》主题曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b44ed9ecec658d034961dc24c5495498199811cba493e983bd737e5fd18ee7. 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/CNA651201903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c9f71865d47be319a216aa4f36b22fda3bb271c2874fc1203879fdeba393ac. 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/HKG732292544.
一身勇 (纪录片《英雄之路》耿恭主题曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9706373d4ff2153769e2c2e25ef91ce70d4e36156c8fa23959b27bc3bf7ec3. 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/FRX201862333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc589c3dee2a781089b428ee8847799217d46b89971a2d0c12a81f6f462b8fa53. 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/FRX201859650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d0418b2a08efc1339a60813d1ea3d74f87cf927cdde7f8b339da95812a8a28. 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/HKE022303797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefae62bf80a17096c3f05a42443a49bb26d7756c51192390344b17fcc56ee17. 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/HKG732481193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7824be956e7fbb0b10a6ce4f90be7be90c0680a293aa7ed1c81f22b29f9708eb. 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/HKG732480181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f3d7abf86831db0f0b6b823c0c92d07ae37f15de66b9399b918d8da80004a3. 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/TWDL72017007.