E.G.family is the name given to the collective of artists and groups under Japanese entertainment company LDH related to E-girls. The project was announced on June 5, 2017 and it effectively started o
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 0x2b1c15a662f7e26fab3c05eb978340a862e0a332839249acb0d8f260a71cc66c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91557f50-d1f1-4b8d-9177-09bd9040ba0a.json and https://artists.proofprofile.net/proofs/artist/91557f50-d1f1-4b8d-9177-09bd9040ba0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ヒマワリ - E.G.POWER 2019 POWER to the DOME at NHK HALL 2019.3.28
E.G.POWER 2019 〜POWER to the DOME〜 at NHK HALL 2019.3.28
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 0xe737bdc461348f38c0abce289199b915b40b9c898c4dd3fe06da7f16cf672145. 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/JPB602002543.
Y.M.C.A. - E.G.POWER 2019 POWER to the DOME at NHK HALL 2019.3.28
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84966d4c4f330f832050fc12d048dfa11c850b1b22ac53539afb4aba4520929. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPB602002540.
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
I SHOULD BE SO LUCKY - E.G.POWER 2019 POWER to the DOME at NHK HALL 2019.3.28
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55f7f8b996bded86b4da6ecdd64aa38e847e9595117b01dd99b26733d6c40c7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPB602002541.
うれしい!たのしい!大好き! - E.G.POWER 2019 POWER to the DOME at NHK HALL 2019.3.28
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749d2ef737932f48d2dca35e25dc20ca7ae09ddc1d5c440a5af078a03c022f9d. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/JPB602002542.