, sometimes known professionally as Takashi, is a Japanese jazz pianist and composer. Life and career Matsunaga was born in 1987 and raised in Kobe. At the age of five he first played a piano and Ham
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 0xfc5c671611139537027a7a84034798bd9638af3b4a8e08e27b7ea7d2d925dd55. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/932ea263-eb4c-4923-ac01-0899a3eb41fd.json and https://artists.proofprofile.net/proofs/artist/932ea263-eb4c-4923-ac01-0899a3eb41fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
オープン・マインド - ニュー・ヴァージョン
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 0xadbbbd3d5133d04a5c071cf1f1b5ee2a2bb1ff4fa31cf95512caa2767f3579e5. 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/JPPO01349318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c76fc127c3ee23eefde41f90f93117a58864efd42d930d852a551cbc1a19496. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/JPPO01349320.
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 0x6654cc5205db54ecbc6465b4672a5300cf0ef7ca7b6856c76d7d22210487e558. 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/JPTO00800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45604c5b07c2f25b2737fe651865548913a0ef081f3a79b3bc5adfce1f2721e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPTO00800097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4444c2f2d653d365558d6131658c003ff9b9e95de5399dfbb668b587729d3d1c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPTO00800099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977ec9c2d78b401f538b8250fe7e1611b4ea59ac08cd691a25ee6ce930499795. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPTO00800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ddad7c2daeee40d9871d05a475b055b8ca55a4b0456f4148aac9f32cf68bc3. 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/JPTO00502506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cd18fc0a8a42df4091e8540ca1a8d2f4221c6e9b9e37c02c3fdfef8da3b955. 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/JPTO00400632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6746872d47090368173a69f18d29b084118e733ee0f072a0668fba6924323088. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPTO00400658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4312541e23039134079762771628bea779511b6f619c99af845602864aad6107. 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/JPTO00400663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc067ec0957a147bada8d34a804f8cfe3ec7dd3f6b80d905a5b847908a02c382a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPTO00400662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e890fc457df3a30454c1b811330cb4cbd9d596fed336bf08d19659d45ecaaf. 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/JPTO00300714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef4b436b9ae47bbcb3b7c34ad9feeadda7ae4b332115caeaa051083c35cf285. 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/JPTO00300715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a31f857fd13730ff777ae0ed112a2614b647ae8f88c833e9a53ca58321555c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/JPTO00300719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4e0344b1485c976863ce67d5a84228294bd86a5208b5a7d9caf83a47efb47f. 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/JPTO00101185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52242b43e12579f48ecb4c9670fec9a591e9c922216a95aa940a3722ac64d6b1. 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/JPTO00101173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c20a815e4e57dfa59d2575b01e73aa5016b65972ab699acbc986a9348c26d00. 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/JPTO00201443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f6abfde1b3b095d049caf27ad9ff7acbd540c8744e2cd124152941fc1325d7. 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/JPTO00201435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc88911f68d1d1fbc6b8dee73bd9b6971797618c26c3c8cf34b72f56365c00c. 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/JPTO00302934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be1a9e6fb0f8e70672acc1864bd20564e6d015caaf68887a0b302e9b0be455a. 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/JPTO00800846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d10fd85208c7551e41062a62abcd4630b5ddd37c242b6279cde8df40986b26. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPTO00501248.
Heart Sutra (octave cho ver.) [piano mix.]
Heart Sutra [feat. Takashi Matsunaga] - octave cho ver. - piano mix. - instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c781d6ebd8ec12992479128d9e218a7652bf9042e5765bc4590ed6d9c910b4. 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/TCJPJ1933130.
Heart Sutra [feat. Takashi Matsunaga] - octave cho ver. - piano mix.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492f61fca9fec68faa15b8493b9bfa270923077a6f86f548fc2770955fe4d972. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCJPJ1933124.
Heart Sutra [more ambient] [feat. Takashi Matsunaga] - octave cho ver. - piano mix.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec57ca2385217cc923fe0b781f76d1e0513f238222a8014f3d392a407e78473. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCJPJ1933126.
Heart Sutra [a cappella] [feat. Takashi Matsunaga] - octave cho ver. - piano mix.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3968010ba3bd46c3430b01fe2e27bc2290d771c29eaf8bb636bedf134cfa5185. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCJPJ1933131.