Haruka Nakamura (; born 18 May 2008) is a Japanese artistic gymnast. She is the 2023 Junior World all-around and team champion. She is also the 2023 Junior Asian team, all-around, uneven bars, and flo
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 0xd45bf44f93ee0497b01b1c0d0556fdf377c0d9fc3a00046a49515e9d97c33437. 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/9334d80b-3e0b-4488-9366-712d8c06623a.json and https://artists.proofprofile.net/proofs/artist/9334d80b-3e0b-4488-9366-712d8c06623a.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 0xf2e41aefb36781e521d0fb121f6cdcebe9a7c09ef73cc37416711ad5a9c7844a. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/JPTF02301501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0030d8cc13685d6dfa3036c9ae8c037db6dbbc5afafd4816579f4cfd3fc890e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPTF02301502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92593845173303ad7c57afdaefbaa6fb587a7a29c16c86026a5bdf46700d2bbc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPTF02230801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99696ba18482083d57dc3399a61b82fc14a1bba4f6f4a00a59ec60e87af11bb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPTF02301503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a81a6722a96c1a07dce5467977da910605270f729be286f47f08d6919a08ad. 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/JPTF02301504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e41aefb36781e521d0fb121f6cdcebe9a7c09ef73cc37416711ad5a9c7844a. 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/JPTF02301501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92593845173303ad7c57afdaefbaa6fb587a7a29c16c86026a5bdf46700d2bbc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPTF02230801.
Island (feat. Uyama Hiroto & haruka nakamura)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28af75a0cd50970c3a4138ee48321ba744c821f67baecedc3c30ce72daa6627. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPH491605070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cff5200d1c705aee0eb3d10a6ef4cce546d93d1e2ed5551e24c74f9e3dfe7cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPH491805000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5683a2961dd4404cb9cf9d1aca6f166d5e81310819a5a2fc13415eac4ba6f07. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPH491805001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f121c26ea23c3a308d492f7af350c72a3526fa449a7e4c6650388f45fb2145. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPH491805002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66a2d74b8cf68092fc28a336fd3acce97e4bf38b5400fb8027b38bfad21bc41. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPH491805003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2de5114ee5cf1c8767e98307e541fa07545e3fe4c4ae89188f2e791ac844132. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPH491805004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862c35a382cce35994bcd294b3fe91eb8e3a624258df2f66a108f3e8b83caab8. 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/JPH491805005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f14c0f73c419402f7c5e3ea71398a5f1fda41b947d2402ae0e3d0746fb9f3b1. 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/JPH491805006.
Luv (sic) pt2 - Acoustica - (feat. Shing02)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76cb0f7468f05104d73ab073c784ac7596b2761c7ed01b6884bdcca7085a2de. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPH491805007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e722a5654c987382de811ab1a7c19e6aa34cb430a5f2e6ea60a49841da5a3c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPH491805008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45323a61e073c0228840ad85049a54fe249a93601d4bf253a4b71f852803d8c9. 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/JPH491805009.