Eiji Kitamura (; born April 8, 1929) is a Japanese jazz clarinetist and tenor saxophonist originally from Tokyo who made his debut at the age of 22. Kitamura devoted himself to clarinet playing whil
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 0x302ac91512ddb685a7cf375a06841527b61fa1afa9bf50914562ff289d9d5c76. 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/c39847fd-b937-49cb-927a-c2b41cce0fc2.json and https://artists.proofprofile.net/proofs/artist/c39847fd-b937-49cb-927a-c2b41cce0fc2.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 0x21e05bfa8efc3a7f4772395656082296bae653bd5b89597709e23244f448c5cc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPG920800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e2fb3abe87c64208f390e168540f6a2acf729ffa5d32e37505b8458b4831df. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPG920800151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4c153838748a28ef89683af2c7ecdfeb01930177aa24f425d74a7aed9920d6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JPG920800152.
WHAT ARE YOU DOING THE REST OF YOU'RE LIFE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7623c06e678f34bf5fe310724d7beeef1f52d81cf7aaecda97d9833c65f9f108. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPG920800154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dac21d5b37cc69502da45b4d2cc3aaa75f122228b4b922251cdf8b877538cb5. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/JPG920800156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3691f3843b19c1d0f39e3add3940392467f6ad3537ee3011d9cf915513eb88. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPG920800157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de63cfc8f8349debacfd33c74b917fd7aca8c0037491629d9a4cb807cbb6805. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:00:50Z), 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/JPG920800159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a24f3ca9db3c07ae5f47b41869102aa139cab3170f10c2947344a90ffb17ebe. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPG920800160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680e5eb91afa363ead671877575df022f123cd0c9e758b06f49dbfde2206bd99. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPG920800161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92a91d41947a5c2394abd0f4b4b7f10bd979dfb3ecf1699ff5e45854478df76. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPG921000532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb8aa166faa5c5a3fb531089c750d6d0c9a9c8fd7c9f9de57da3e693d5bdaf3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPG921000534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a22960e96f87327ad856b28b0b7b914a70c58d9426b8390178527ed3258f127. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/JPG921000535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff51ffdd1d2cf57bbb0d3e9ce744c46cb92f6b28929d951e1c0b1e6b32d4d971. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPG921000536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf332705519b397e8f61e6ff06f8c8061eb32f80152220bfbe34f87872f3e4f76. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/JPG921000537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec5cd5b9dc8a62d7e05fe7213d68abaedb67396990b749450f8aa02dc2fbc4e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/JPG921000538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896153136d0d5d7b534aa70056a56868acb1efcfc81945148a0ae7523f61eb84. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:24:41Z), 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/JPG921000539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f7db7530d66aecb825426c6ffd8776eb44aae818ad6585f9a1f605d4285b5b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/JPG921000540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc781431142acbab1e9364289c984d3c054986fad188028748a571837de860452. 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/JPG921000249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9382946aff1307d92277e4a9fdc6b5addd62c796bae7e75b76df3c396601ac. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPG921000251.