Noritsu Koki Co., Ltd.Noritsu Koki Co., Ltd. Articles of Incorporation Chapter 1, Article 1 is a Japanese holding company with subsidiaries engaged in the development and sales of audio equipment, the
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 0x825885a5717f13b971e284db0d2f449e9e65fd586ac99aaaa7c1217a14716db0. 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/4f86d112-df27-4f6c-85c1-98cb50a6830d.json and https://artists.proofprofile.net/proofs/artist/4f86d112-df27-4f6c-85c1-98cb50a6830d.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 0xf46fb6149e1a6db01898dff9a74a7d3ccb8ec52582b17a1412e72f356d279f54. 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/DEQ121642605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e75bca860a4cc9f9684c20ea7e7e2adf86997d3362fb3d6dbd4b41cb76488a. 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/DEQ121642614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78b6af4243fd030eabe6eb3a07375fe267b56336425978ad2df3af3eafa68fe. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR59R1736720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f9cb97f1802d253ebafa884a9aec448a221a96422ae1e91f2e0a787cde6fc7. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/DEQ021801108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b3fc976bb77c376bab6e9556dfee055a517a1a77f1578cd8b5029674caeabf. 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/DEQ121536035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cccd9af3459114e5a8f8e5dfbfa7d09309284536e6caaecd9ecad173982d16. 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/DEQ121536038.
Expedition, Vol. 1: From Ghettos to Galaxies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1eb375bb6a06db5ce5a9f7304dd7e596d233d2ec6b071209c6d4bb60a71581f. 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/DEQ121430638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15974be2992e39b93349c718fa8fb954a6b9cdcbef711e7d8d1649c521876e4a. 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/DEQ121430640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadf7ba1349c7eef96dc954aa648350ca3e520df28fbbd75d1770412cdfbe712. 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/DEQ121430642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338dcdc00a9356166c6fd3e365cce9518a07d85f59352061f9f8cc396b90bba9. 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/DEQ121430648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269badb56cc96748139229b38b650e9a596a70bf0cfc2f406ddb4dd7ec0cd596. 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/DEQ121748555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841432f04254cce0659cc03cbc66ada80b5bd6590f4edf0b0fc493195e30db58. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DEZC62437248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61038c1302d95acccae07bc26c17504f856bb0ce6d29d3381346ed22cc214f3. 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/DEZC62450730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5b9339ab3890f5617c56d4a408dfc3d426ced7f93b881cdccd3064ae1a44ae. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEZC62452970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7398c519945eb9ad58d4ea85f472a9fd8a49d71a7b43d8e3b304b3d8a135746f. 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/US7VG1986530.