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 0x36f86b06f8d2e9e12e554f1096179af39e07fac07113023715f9d16597f5aed9. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67623df3-20e2-4b31-9acc-ad80f0575b7d.json and https://artists.proofprofile.net/proofs/artist/67623df3-20e2-4b31-9acc-ad80f0575b7d.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 0x653b86af058c2d2f54a7165d9efff9b5807a592f8a333db82c8284fe1948b203. 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/TWU712404430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c5aea7ca876c6a57e115190fd2535607f67029e0780062e2525dff5d6794f3. 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/TWU712404428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1d31b5a4f75da86371cbd444408e6576f68092f77fd467ee00141ddf4946f0. 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/TWU712404432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3de97d2d050381fe96f7e0aac73051f6dfa65e59dbae3caf906e9d468f18007. 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/TWU712404429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb467a669ad8e9eef90914f2e3478c3395143ca8b2696522011146ae56cadf290. 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/TWU712404433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2569f6929fef7a604e5c82335a2e0eee269c7526d38716d517330e899e9dd7a7. 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/TWU712404431.
不見 (両想い) [手遊《陰陽師: SSR階式神夢不見岳》角色主題曲]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9b3c056bdcf4e8ec47b13608d9eab17376e2e738d30e7e7cf935f6610e63e7. 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/TWCG52299968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f5bcb159158ff0641d10160d56aaecb9fca698fbc163fef0616235fcad0e54. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TWCG52299970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae16f17876dc94d430c76989983a7019049e672cf69cf7de2f17093a9c01108. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TWCG52299971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886dc44cf310e9f2bf268356910b212b03aecec6d1b6276a2d72cb641b842b29. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TWCG52299972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9565fe93201478c349bc8b3455ab996707bd0dd21549dd20bf7b2276614baa. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TWCG52299974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaeda917e40fb9b1a0805dfd1d1b1a2b26d75efaa270a191ea251a1c4674074. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TWCG52178882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c94144dce3dc617737a5fff994a76d553789f13835bf6e9a68d20a46fd042a. 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/TWCG52178883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fdb2d7a61b9db2b551ea80a5bfb3590cc258e7204e15082b398a3b86b896b8. 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/TWCG52178884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc4d6abe2ef6b27026a07b2915bd1dd7673f1a28c1e7b320c2f745b86520cfc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TWCG52178885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefec8062cf241e39e060083fff5b0d940bdf49a28e51bc87307fc80bef571d10. 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/TWCG52178886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d04f18c5268e69a8946633a07d32781f49447cefe38d2ffc591029b119792b. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/TWCG52178887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06de635713f51295e1c7d2d1822744f271b9c5e0694925490de03755b5c931d7. 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/TWU712409336.