YMCK is a Japanese chiptune band, composed of Midori Kurihara (vocals), Takeshi Yokemura (music, lyrics, arrangement), and Tomoyuki Nakamura (composition, music video). Their work has not been confin
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 0x1145f3987a64caf73a5dd46f5d20c80977201dac9cb957d0a7a6210189127673. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcdab5c8-bd5d-4df6-aa9b-56148169099e.json and https://artists.proofprofile.net/proofs/artist/bcdab5c8-bd5d-4df6-aa9b-56148169099e.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 0x36c9c42a582987548c948ce58e110b95d5be69d7eef639039a5647dd1bb25f55. 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/JPS809905244.
パステル・キャンディーは悪魔のささやき
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a0d4eecf7926bf0bf7f66e895388275be3648a1b8996cf71baf04e67520bc2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JPS809905245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe452cf586405d9396549d86a5b4b21b6778afe6b2e7b128ecce26452989abfc. 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/JPS809910703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d2e55a0cafe247fc826b8abcece59501c281f61f1984279827b2c5425063ba. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:04:08Z), 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/JPS801942727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe17b88524db046e12a6869900798c9dce19bfecfa9d455367181e50898f7b39. 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/JPS802100285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe17b88524db046e12a6869900798c9dce19bfecfa9d455367181e50898f7b39. 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/JPS802100285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea5c0a73d9801dcb46f9883e1963ee43dd00fa8d87f13bacaa5b7cb00d9f996. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPS802300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a52aacdaf6b2318b4106a403613efc01bdb4b99f869df7798659dbfda57060. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPS802300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e98633eef19e523b894e7d4b12793ca1e94de357f2e6e68e785ed6492a5faed. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPS802300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9145cf6fe7fbc36731b79055083e9fa0f2473579b9fb27c34d1ad153dbd93d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPS802300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04fe0d2f45aaf73e30d9d920f2a108646f222ce42a78ad9ca75958b4eeca620. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/JPS802300070.
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 0xd4227b071685890e7ad5daa1a62cb4c0a6c637b91db14dd5d670b54a47e7271d. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/JPS802300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12324bf6178875f80d1af554ac8b15e80abc440238b546e31f946d887ac1eef6. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/JPS802300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e111b31908126a99240d2d53c594cb02a22621b9f83f4c8b8d1ffc3e93a542. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/JPS802300073.
Nuestra Gloria (La canción nacional del Principado de Retrojuego)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487e690b65166a4b58d2cfe75f3acdfe6b7affeb9852c10c50f0bfa0ddec037f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/JPS802300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9539983de825dadbd8363936656fcc663bb473c23c1ac76e86fc5cb081381c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPS802300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d06c745beba3684ef5ef1189b4675ec83abf1b5a4a1ca7951e8854f2a6d4cd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPS802300078.
逆らいがたき運命の中 (Covered by ジェッジジョンソン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da6548a244333282ad3c049462e6843ca579dc82ab02865a08bff810c3f69ba. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPS802300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628e38b4a7c63cadacafd7a7a1db060f2389ca3b05baec91e03d2318034a0350. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JPS802300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb170f6bbe152d860ac3f8032b0263e2590c9445dcde2a9ed9f236d71f21273. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/JPS802300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3959c88b8754676e9a0228781c13c86b1f10f5cd648395e15c6c4ab1b2f501c6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPS802300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548a89af9ccfd9707bd3681ec71b407a2099abf100a057fba127145bbbf72650. 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/JPS801912244.