Enjin (エンジン; formerly 円神), stylized in all caps, is a Japanese boy band consisting of eight former Produce 101 Japan contestants. They debuted with the single, "Say Your Name / Enjin" in February 2021
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 0x3d30a9edf0f06a13513fb9eef687db6234d3b95d11835ff3a879ee462ba37b7b. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/249b41ab-a02b-4410-a424-e8b9208921c6.json and https://artists.proofprofile.net/proofs/artist/249b41ab-a02b-4410-a424-e8b9208921c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ワンタイムショータイムパーティー☆
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 0xd8fb81de4556e92bac1d9d8c675993ced7535e6bffc6e8cfefa368261edf70bb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPPO02104753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6646191d7997d795a463e8b1e274321384a6087666576900e6751d4257a15a. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:12Z), 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/JPPO02102088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642311db56d9fbdbe8fecad601707afb5e49d2ef0720625b84cd1dbb02249301. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPPO02104751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759144975b60add1b02fccfe3eea5c90fc484d7fb3490ed538e079a76e909ee7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPPO02304496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ba77950e5943dc58aa7447aa953b55039376747b0b4c22a1157d9d9570712c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPPO02402089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f2f933b206656abc3b90cbe11a3aa3e9ee6b840ae3f095c97ef6b4728f8257. 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/JPPO02402090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6daf4a1ec9a6f109bf075615579a4557ed179403ff78c0ac17572de10e33595. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:15Z), 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/JPPO02302158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759144975b60add1b02fccfe3eea5c90fc484d7fb3490ed538e079a76e909ee7. 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/JPPO02304496.