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 0xb4c9920ec4d3e890e29c6054141c28f1957130c1bd9940e18a40344969198ad3. 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/4eac73f6-802c-4b9b-9c7a-3cf19f1f7b5b.json and https://artists.proofprofile.net/proofs/artist/4eac73f6-802c-4b9b-9c7a-3cf19f1f7b5b.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 0xf55dde894c236af12016029bb8375e2a1129addce8193517c8775751e45aa558. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/JPE561501286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2b3639bcbee4ebadacbf9f96d0bb9c77face885b647390dbd8af30ee59845d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPE561501287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e625b70a062126f593914974834741a07a3c437060c86561b8da86287e2b9c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPE561501310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616539ee66527fcf3b2986de5bc80c04dc0518620ef40d8ce95cffc1d4314cff. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/JPE561501312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436488dddd14bcdd9ed81b9b787459ece1dcbff4cad0604be6599e520975135d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPE561501327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdedce5db68c412cf55112ee55d14b4a12d759791da551a821015e53291b5d99. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/JPE561805212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b342c6e3c5d2e2968247e2544bcdba02ab479f8aa60c9f07c3246d0d283d92. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JP92Q2200278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc201ed447e9c191cc7392c87979055e735341744aa060ddc4e58e76fc7d98b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JP92Q2200513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03021ac9a85c43adbfdd3fe772a181bb50700d59d3cf410cab4c9d71b5baeb20. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JP92Q2301460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47534425b75e0de53ecf1db65f952536c504d99b47a3d6c41cc185b16da64fb7. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/JP92Q2502348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e65a665f61cd75659d90a3a79ce46273da53f1c6a73bf0449a5146968ae5f9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JP92Q2502350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ed4ce07d218a7ecbf715f1b8805583b7aa692f4c7a2d22640e5093e4b928c7. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/JP92Q2502351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3eea4ddf9bbcb077e9be7dbd55c4d098d29a63c2260485d3bc811f4bc323fc. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JP92Q2502352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0245ce0a734cfc9825e53aa6d389a405b4c3da116f8e449ac6a474e312d1a1b4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JP92Q2502353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564ff0521f83eac8c272b82a4fb337b654795ebfcb5f35c154cd1a686d0ae69b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JP92Q2301044.
音楽的同位体 星界 1st COMPILATION ALBUM メタファー (vol.1 詩想のメタファー)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a19d29ae6d1fc6c759ce140d8f6a28a8f7da47762f2d06035726fc865c5303. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPY392200411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0375a4d72b44ad6d8e3a44e5795efd5538b8e0ad69219f60eb1b425510bec908. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPQ941401109.
Exit Tunes Presents Entrance Dream Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6392bd540d4d85db13b3c02ce28929ce5674dd6c9c75cb1412481c89f51e6924. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPC231500679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79e1118a02d321d8e57302e31e3b05526032a1e848d9e9603fafd965c684566. 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/JPJ931300222.
Don't give me such a look - ATOLS sweet dream Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d2a5fbb2e5ef4ae0dc833b32f3f6e6897fbc4ae4c16d0a209d2ff53a976142. 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/JPJ931300064.
音楽的同位体 裏命 1st COMPILATION ALBUM パラノーマル (vol.3 交響のパラノーマル)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e91fa79b6052cbcf868077c8f970980e7e0c54b6188626dc469ecd2f15edbc. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/JPY392300901.
KAF+YOU KAFU COMPILATION ALBUM シンメトリー vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc6c5520d6718df9e255ee2368c6baaa896e81e0892372fdfd1ac0ae0f2cc0a. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/JPB602121080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d8485ab4166c811fa295582ea9a334753079e090a002c9a92c2d7fbecdd4bb. 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/JPY392301022.