, known professionally as , is a Japanese electronic musician that frequently contributes music to rhythm games. Biography Hamada started writing music since third grade, having been a fan of rhyth
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 0xf2f3ab423cd198cc7e993b999d3bf57ad52142cbdd998b4d29ce72f346e1fa9f. 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/477205c4-b2f2-4f7e-b0db-6629c222fba6.json and https://artists.proofprofile.net/proofs/artist/477205c4-b2f2-4f7e-b0db-6629c222fba6.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 0x75c05d87f0f628e4a0d33b6ac07124d9fc8cbd7ff817a10f04fb08fa3d9a4c2e. 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/TCJPO2150966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6794d0dff46add754ab11f291ae653a7d9f4e91603a7361ae7c2770767b378d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCJPO2150967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb29931ce66f8bd4eb718a0d3513469d41e37e9f11b3d9b516bc8c74e41ade9. 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/TCJPO2150968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba32aa85ecc2e215f4defbd844517556ded968ea091f4de477f8076fec2190e. 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/TCJPO2150969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc2cde4e8abc33c0a516b044016bca452674d89ea0a8bca79a0055d61ba1c10. 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/TCJPO2150972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959d0c2a8a2926dee8a7fc954e1a5c900cf72df4e032403708b54d0f32ba83f4. 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/TCJPO2150973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4ae1f89cf5faeaaa51e8fdf096459b8c5fca2e735bad174ddd4c3cf8d29b94. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCJPO2150974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d8f2b0977cdf92d086f0db988280b030699e35d627fd2951e486f06ba6d360. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCJPO2150975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439b8e3d0568fd2f72d850e0dd25c992f6bacfe9b28c62c4be3f62490f813741. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCJPV2371984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97206a86993ec4ebc4f7ac16cd209eec2fdfa1b8d29f5edeea7bc736f921b10. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPV2371987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26563db95275be9ccc6826c2ab378146734c0b05c183f452c2420a4a26c0a181. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPV2371990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54322bd3eb957670d8052e6484703c765288f715e504b27ef86eea6ebb8024a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPP2195414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2b2d8421104a4919abf5a4de80d186fc5e30b0c2ed516b397c9b2c0a9741c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPV2354226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277be47cf43bc5e4ce4393fcc1df07651e54742068363bc8ff49ff50371d32a5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCJPV2371997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f824fa5328431abc9d65130c87d6587e0e3c69e986fb079f7e9ce4dc6f294c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCJPV2371999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16d7c93f92006ee8f5e5efbe316259d50fe9ba04a73d5c93a9236754c35fbb1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCJPV2354299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739530aca7c139d4a7039e0291e975a29bb0c9d54cd71f8bb238e8abb7bbd38b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCJPV2372003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509779b8fe73651196b76517522027c7a3c6542a862e019f48e5e9ddc2bacc48. 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/TCJPV2372012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c576528c5518808ec37ff79c944d1a7a867f0915e309f9746474c7d8c5b8c4. 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/TCJPT2262860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c4ed4c68f9457822dbfd159a08f6838f2c4d0d19ca1f80ee28658f1bea8ce8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCJPV2344309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862e1e529267eb380dc0b3f9f31c0842327a333df362f2904fb322e22990b8fc. 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/TCJPS2243678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2460b50d604040e82d60fb663936881f749938e4b9444bbaa242a9f3305ee3ac. 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/TCJPK2026929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b725b6432bf1671614310a08eb12607461f57ca618408033d6cf571d3f8474c. 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/JPP561100468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935003247c96acac5eaf9b418f7c7838cbbc798bac41259bc28d03520b9833f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPS2244306.
Arcaea Sound Collection: Memories of Wrath
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc2f3c5b255c4651e28652eae32db1b1ccc8212ad90b6b6164919526cb18299. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGF2286613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bb8a527ef963fbcd161280baded473de8c4a549de94a54abed6b79c9b41b41. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPP561100994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac3fcc21f3052ead3cf10bdb334bdefe083b8b549580aed9d8844ffc48103d2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGF2286624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c1bcbc3bc6e20b9859ded67fbac898142a6c133aaa790a14dc57eae395759f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPP561100466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e43167df57d1a99d6da4644e4b5f3072d3c8467c09a0c6088e764e5b7ece33. 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/TCJPS2243700.