Kei Ogura (Ogura Kei, 小椋佳, born January 18, 1944, in Ueno, Taito, Tokyo, Japan) is a Japanese singer, songwriter and composer. He was also a bank clerk of Dai-Ichi Kangyo Bank, after graduating from t
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feed04d8278a41b0b9b96671d2a02440c8a0523c597853ea522b49f7870a8a5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78e5fef4-5ab0-4ec1-af91-781e498e1a3a.json and https://artists.proofprofile.net/proofs/artist/78e5fef4-5ab0-4ec1-af91-781e498e1a3a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8045908bd0a838476ba13cb17757619c503fd95d41aa45c4ad7f20c3a720e79e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPPO07510510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4748040df3b95cd52aae1f0e92fafa08202aa1903362c064c85cd57ba12787ee. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPPO07510530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a11b03cb7b688aaeba72f239af27378e30f15eda57bbda2d36852a86b67cdb1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/JPKT07620101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09ef298de8fe144429090146441fb73debc065cc4f8112560158528004d509e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPKT07620105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862e86a317862d3ed52d56c19723ffb6f3ef04858d332a370b5c5f3137098b5b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPKT07620107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8023c4d421982df4940879d1902962c7b691d59d55581314843d25d1b7c490. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPKT07620108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a43cfbcf4eeb4692732dfddbb2ec8812ddc85155dc8570f4c7908c9e7dcb7f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:37:27Z), 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/JPKT07620109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecf41e84459f92c8dcc03e74dc077fc6b3a0bdefef4b3bf3a896d277e514791. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/JPKT07620111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22ef7313f49bf50deef0103b47f87c0b3b8c6d569f3ee81929ef5cbc0e55078. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/JPKT07620115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc113764820a6b4ff900ecd800ad2bcb306b8488dc8641329666c6409423cc4f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:38:41Z), 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/JPPO07402035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4da1d5552ddfd0ac0da0e5f545bb5fe2337774fdbe00e3babcfd69aa34b38dd. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/JPPO07401310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8736b99c61e4ec4abe7bff96598206e45bcae5c56dc60c06d122759f9f39bedd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPPO07402080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8f3f8e57cb83be015be5e69f3e0525e35e055fa8fa6599caabc7bb5a65e948. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPCO09702510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdae5504efda605b29631e0ece0baa9beff38c23fc3229f60526a9c082fc9132. 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/JPPO00509950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9ae7cb65df9bb5bfe104cc65d00f3cf10f104f4c959af82cad301de2f74467. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/JPPO00516430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f45ad4277c1c19e9f99a265c556f07d215b51d946f9e38460fad136238af53. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPPO07501700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1663151c7f2aee50dd171eaf89bcb294b1bff90dcfb20fd62099f1a6de0a43d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPPO01003020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d09e83768e136d99733b17630369468ca11556f25364a942486cdecc26277b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPPO01003070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57893331920a0f4135f6c987911ac44ae34404c94f6de7f24872157f14778af2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPPO01155197.