Hatsu is both a Japanese surname and a unisex Japanese given name, meaning "beginning". Notable people with the name include: , Japanese manga artist , Japanese wrestler , Japanese politician , Japan
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 0xbdb79a8f2efe3f9ae956f990b261479ba2ba460b56ba22e52729809d68ef3afa. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9e0059a-0ae0-42f3-94d1-d3adc3dd8a4c.json and https://artists.proofprofile.net/proofs/artist/b9e0059a-0ae0-42f3-94d1-d3adc3dd8a4c.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 0xc23f26e71559ecdedb8a212f3610705d872fd8eba6937d914fe2399200723bae. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZPJ32349293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc64f340a09cac3e5af8b2af5c597d2a330eee32e294038a735ad1f1c229c65d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:08:28Z), 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/QZPJ32349296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a47d81d9e6d452ea84374739736390f218513d0f4282e87800a95aa26d85e88. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZPJ32349295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e18cf470490d78941b155565733543896b7f37bbeee8b0973c6c830d65fe974. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:35:13Z), 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/QZPJ32349298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8a98fc8c1490fa2561464d4b04f0a2ba470ffb3545823b0965ca31687aacd3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:36:41Z), 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/QZPJ32349299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7aebf727dacc3eef734b149a05727116e71cdbd1dfacee7b21d95471a51689. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPJ32350969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f068ab80940067e2567b3ba07084ebb3466d58e2fd1b381ea00dd7c52f26a6. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:42Z), 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/QZPJ32350971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc3ab2c3550549f3f0823019694db6ce4dc3f4569df2b2364277c041fbaa6e5. 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/QZPJ32350973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696a2a6df14845d4a510794cfa5dfd77878b1f164b36abeb9d7a656968ad19e6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZPJ32350966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b8884bf4b7de681d920deae1b18f4f91acd803e93a7caa0f8f027057dd4852. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZPJ32350968.