is a Japanese rock band from Fukuoka, Japan signed under Universal Sigma. The band's members consist of Shizuku (guitar and vocals), Harushi Ejima (guitar), Yuki Uemura (bass), and Kazuma Mitsuyasu (
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 0x1938815e4ee8e31c74e62de50598aa9a8f52949694f4ef875c915be853eb1213. 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/016181fa-d0a9-4945-8d63-a296af10f8d5.json and https://artists.proofprofile.net/proofs/artist/016181fa-d0a9-4945-8d63-a296af10f8d5.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 0xac0bc11340b5d26c5f1df51bb6c2f92237a440af7afba0d1c64ca107a259feb5. 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/TCJPD1684652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3774d79545c0402a919a6c1b265d36e786a07b2db81e14bfa3e47a447966ee. 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/TCJPD1684654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc2bcfccf77173f9b7f764699036ff76f5fba9817a9945fc092058740a5aab9. 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/TCJPD1684655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0bc11340b5d26c5f1df51bb6c2f92237a440af7afba0d1c64ca107a259feb5. 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/TCJPD1684652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3774d79545c0402a919a6c1b265d36e786a07b2db81e14bfa3e47a447966ee. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCJPD1684654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc2bcfccf77173f9b7f764699036ff76f5fba9817a9945fc092058740a5aab9. 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/TCJPD1684655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1f0f0b8af23cfcd88765581472716a8e4661bf6f7275f214d00c87a1e467f4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPE1674749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce0d00572395d41d4c5dc8983c15cddc4062af75630314ade0633bcb71be47e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPPO01705920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb15214f5483b6cd4db5632b7caa6d4494c44cd36d7d463c5944a6be63f8bf4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPPO01801480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7013006f8760347e7a00f88ef0b7b8526791ee0c7d8d2389c6c26d13130dd9. 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/JPPO01902327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414ac8306949b815aa2d0dbcd2fa2da69dfc1d6efc2dc048047e3615c7d97cc3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/JPPO01903492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5b8f619d83e818c5979d14789ff770576a4c8fae43751ab3111c0f14d081d8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPPO01903493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ae8734b1e83fc5e0b40f0cedc5b912aac44189c29f821aa4efc24b5f9f6f29. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:01:52Z), 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/JPPO01904518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e4c4ead40b314daf2157ccede2a742be496c47b4dd9892d98875f06b37a0f9. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPPO01904988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e4c4ead40b314daf2157ccede2a742be496c47b4dd9892d98875f06b37a0f9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:52Z), 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/JPPO01904988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6439b5d29dda5a21959579a588de59340c4e37f9b5fe34de41f9797d5b4f61f. 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/JPPO01904517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d623a3c67a700f6f145feda28798d25d0671a0208755ff3ea3b59cc2383818. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPPO01904350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687e5b7db6c2358de04400ea5e4bed5b2014ba52fbb28660b1c81822feffdd06. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPPO02100988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52086332e0617faea8d8b9bb8e5cd1f1ad672a1a98c1851313bf48aeb3649d58. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPPO02100989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d99202bb7e12cb60be489abe9c33f9480a9cac583af2e6d4187635922faeeb5. 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/JPPO02100990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34173dadb54288901f68705309d2b4ebdfab0baa0c402de4e0fdfd596d1d08a3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPPO02202992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffef7a0034010432b0e8b30d1c1c0d7a793b67cd683b5566a98d207a78cf1958. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/JPPO02202996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b543f9a005c213e620c2af72269f263a2634f2f9e97dda66ddf515f629f241. 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/JPPO02302748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb66f3610ddfdb54dee050a05d735548b50844b62b1a9ef18bd9bb330b23f2bc. 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/JPPO02303048.