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 0x745fca940422ab975ae33ed393b50d050b6b48a5deedefef5e1656856918a430. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0521127b-1abc-430b-b7c1-b0ca72f6e1fa.json and https://artists.proofprofile.net/proofs/artist/0521127b-1abc-430b-b7c1-b0ca72f6e1fa.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 0x8ee3c196ab5ae39864d0388c2e2587bed4b07bfd39fcfa20b7d634f7cc1df672. 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/HKC339400142.
城市獵人 - 無綫電視卡通片《城市獵人》主題曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df251a155f49d8a61aeca714ba2e60f9c5b55f7e44fc1192f3d3a51eb6fab22. 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/HKD240000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b9769db9dce9b82be3b9a2236deb2ac185674cd520c1edf99f25d0417c0a76. 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/HKA610300295.
千年女皇(無電視節目"430穿梭機"之"千年 女王"主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa01dedf9beceee8bf305b5bd11d505bd9a524c55eb23eb27fd368f787af3fc. 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/HKA610000745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea39d8064345afd99b80a91944984f60997e881bb7f497855a07ab3fb7d9ec7. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/HKUM71000618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10aeb1ce031e9cec3188defa8da9d2d1e0b11aef00a60d1f732cb372b85aecad. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKA610300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe0e77f4137c4994869ceee57f531e4c96a1395d328c608d5d0c7bc84beae36. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKH580100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7969d2e643b0e26da8d150513532128e0c4f80ea22e73d074d84ab90a5e8a7ce. 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/HKC339800148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d40d53a86f8e531fe09af2ab0044cc14ab5bfd7a9548d378bd0a4d29916d0bf. 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/HKA610400176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23dbbf15de912c538c81f80eb7b09516701529330caac2faec0776c0f9ad86b. 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/HKUM71000615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6f4a8f8482e4e292ffe1d7312dfd35d8dcf24271fa0ccfeb562e773d1fa9fe. 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/HKA619900276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ab2974618a0c3915590b3fb8d3220f2e8bdb43666b01098fff3ea963b34b4c. 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/HKA610300302.
足球小旋風 - 卡通片「足球小旋風」主題曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42fa937e76d5b8906643b04259291ca645aaa8e0da1745c33ae4ecec8288deb. 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/HKA610100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad582f940d99034ce4eef4420b4f5ba3639c996c680c36880ba942b93ab8dfa5. 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/HKC339300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284ee57acd9e873adf119dca7d4259129d1d2494e70c53cc40377d65b13dca4f. 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/HKH580200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7df1df7ff6bc804053a0df973e10d9d3c98b1ba9715e147a3734881d5e92b3. 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/HKA610300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc6f5bfe926a286fa21692706f6bbe38dab6262c28266f2ee2602e14fc9b756. 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/HKH580100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598c6b2b1b261aa028a64a12b2a7d4211f89f90132e536a2c1712cea91241f32. 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/HKH580100127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eed05b9b00d0c4328ea896d90cfff9a3d5fa312c957551c4716184dc230bc97. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/HKA610300268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9906953b0ae82d6044ee27a05f0a4654b99af09e407585c1e7e7d9662aafaa. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/HKUM71000617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736e07558568c82edffff7a8d5cd5f78e9dbf1137a8b1182d3a21a460e65861f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKUM71000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c299729726c064dfe3c1a7175887683dceb97a36c164f80c2f382929658e400. 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/HKUM71600957.