Kamiyu (stylized as KAmiYU) is a Japanese group formed in 2010 by voice actors Hiroshi Kamiya and Miyu Irino. History Kamiyu was formed in 2010 by voice actors Hiroshi Kamiya and Miyu Irino on the l
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 0xa59011d20c402b6adf7856952abd7c0211175995bf36c4b17a5cbc16fbe6c589. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/056f215f-2cf2-4ab7-8c4e-db49b4d0fbf5.json and https://artists.proofprofile.net/proofs/artist/056f215f-2cf2-4ab7-8c4e-db49b4d0fbf5.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 0x5f90ff185dd69e8917113ebf1e95402e313c4fcd8089dcfc416f3f2e3fc05da0. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/JPI101001796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c2a46a778ac9da99c34f9cfba57f48ef599003f01c6609c69b3a3f1adf8285. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPI101101272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea709fad2e8292f2cd042384d403f0e4ecd2349e45eda42e497817df1ab8e447. 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/JPI101101273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016f0973225452899ab94b9ac2dbca72c614e8ddea714dd8115ae369fb3568ad. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPI101101274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd12e19d7d86c1324c38e550efc648618f95b3854334622dce1edca60d3d3c48. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/JPI101101275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf92306697ef7ec6df4aae37693b08ed9fa0c3ede1c5e78a59baa82afb19666f. 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/JPI101101276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ec67aa91636a9ff1da10a2db3998372855ce0885ef83e2ae62c18f6fb9e920. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPI101101277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea9f344aa2f0940fb3615e2cc87820ae8dcb3e2d4c402004e88afd00ecf09a8. 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/JPI101300753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35f4c08a6b75e88613ff0b8678a0fa9d35b27709425e09839c234cfa73efcf8. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/JPI101302619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbde92e49516fa5f099c5c56d6bf6ca78dcd2802271429f85558e0bacc4161e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPI101302621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d93e27fa92cc49c5718478a56f4ce108e65ce3915f661706d2432bb18ee1b5. 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/JPI101302622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb508fc229883a2501fd46f69c599026019b3506c801909eb560acc69bda06395. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/JPI101302623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f0615a5c3d422fce94bab728ce729e74ccfa98c3c3b866e80c35b82d32f325. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/JPI101802048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93b437cbb42c36537b1acc8589f8c2e6da6df39ecec6d7e9283e781472cc697. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/JPI101802049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99813bbd8441d927a2f89a65d84cbdc4c7917332f300eb687e54a6fb1453ee5d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPI101802050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d217802648a5ba7acc10c967bc58c666b87e09dacd7ec69f13fc5600c1fc0ca. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPI101802051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a6a509220824c1651e9ccf20461c45a1330da8310a52b292a2b667653b8c75. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/JPI101802052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa406640d296aa315ca6f1d0a9c62d8c4f352c2c17e97a298c68a07575a6c4d40. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/JPI101802053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85c71c8e3a0db84d37f198f1a251e5136f066a5f2984c1b35e2149a5816e7be. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/JPG531901591.