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 0x284815daf1271dda47021d4f5544be1b88db14f9f2d9ae81fa7bfa874e464bd6. 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/a54495d3-b38e-4b1c-9d5b-431771242483.json and https://artists.proofprofile.net/proofs/artist/a54495d3-b38e-4b1c-9d5b-431771242483.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 0x90babb06b6d1a2a94a3e1a3669afbfe83409536aec3f7e9bc6e8872184f2d54d. 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/TWDK51702001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1a3c2b8e81b5513dac2220ae101e8239c0dfecd737b449935225bb006ca10e. 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/TWDK51702002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72fabb207bd9f3af3b8656bcbb2954898cb3e5caf1f89d61195451eae22729d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TWDK51702003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd753ac117c593b83860519becc355b6a9827aafd5755b5fef6e4705d5ea95988. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TWDK51702004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5393b8d9f677be8e45fb1620a5edb5ec96ef4b052299b851bc1a1dd206ced18c. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/TWDK51702005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e974ffbc4d363efad9acc814d64c4793766381cb769061eb970723d9d4ff679. 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/TWDK51702006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf520eab4b71e3f4d86c1a3c142a92f18619250c04ce52253b8be59d8cf1511. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWDK51702007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8308247fe07db2cc26bd73388c259e1f161eeb2d31a4ecd36354ba06d782f023. 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/TWDK51702008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace97e3e163d705133f90a7e91e1faaa0994aa6579c51c40c2f70600e1d82f7f. 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/TWDK51702009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7902363b423b449c7bacb4e76ce3475392d7bce60feed8644dc2f4fa252556. 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/TWDK51702010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae71c3bfd5df0a70a96a0e8d9c7c0a13cc80b128c7073301e40a4ecb20eb8c4. 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/TWDK51702011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cec6420934cd9be83c58bb3d6c61635cefc8cf683558070defbabe9c56621dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWDK51702012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b20a5fbf79e1ea552b67a534b244e690cfc8006fa90540c16156a43b2948d6. 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/TWDK51702020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95906d1165bf0e13b09de5589be059dbd1d84038a45019e9ff2a96a23ffa4ca1. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWDK51702023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3d0494d833e5f088a564b209595437f6bba1f329d11d944ccb077e5a75e1b6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWDK51702024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd609ba9d29077e9e891897aee44dde8e73b930685df15edb2a61926e0da5a1b. 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/TWDK51702025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf001f9feda61404b50195f81ff3c9749ca9a1aa36fb1f712402465a152fb9f. 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/TWDK51702026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dfd7d5b049ba1d43daa98d0e1fb476d6e50d2836605ef2990eb16a9fb7de47. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWDK51702027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb16c91f68d94c4a494c63b893cbb0677180f4e277ead7d424a1268913b5b19. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TWDK51702028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee874447606a155179119dd90cd7e0c5dd576566f92f675c45a985813a42f12. 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/TWD251759301.
普通人(伴唱帶) - 電影《英倫對決》推廣曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9644582aa8afa8d433945cbb58118abb09d09c64016b06088d7e8d2bc19e34d9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWD251759302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5274cfe356105da93b3b38c439f998b4ef1dd686fb4c2023dcad18ad2851e555. 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/TWDK51405022.