Kazuo (カズオ, かずお) is a masculine Japanese given name. Possible spellings It has several written forms, and the meaning depends on the characters used (usually kanji, but sometimes hiragana). Common fo
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 0xb930028332c4a460646fa0e644eab207f527fbfea98ef65165a974c8eacdeaca. 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/a350a913-5d78-4dfa-ab22-4b05e4a87032.json and https://artists.proofprofile.net/proofs/artist/a350a913-5d78-4dfa-ab22-4b05e4a87032.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 0xab9cd98c463d37b74062781a9ec1b7e3b4ac7de2090257704f07811fab146a15. 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/SE6A91882221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2222d3f4533fc16858914af4e578c28316f69067296fcadcc5a5ad7c65a275a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:52Z), 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/SE6A91913015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097b9c2d0c6788317fa1fd4d1be653df5ec98c48829adc7c28a00244296afe4a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JPH492001093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694fac0a54cb187732d07e4018e719c14ab4923331927d9559521beb4565d5ba. 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/JPH492001095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd35b264a0cf0385f7e8baa47cb771bef464ef84511ff39935043c1ac499de7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:42:33Z), 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/JPH492001097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a25c81fc739d22d0a5514a620e8c88a7f9ccaae2040795a08eff257a137a209. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/JPH492001149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899394a683662b9ec2ab86ddd58942c6ad5fd9a936445cf4b895f71e27ad31f3. 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/CA5KR2133596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac57fb708c0305a2be08b5de260879d544116fd3b0787abaf42710e9b68ce90. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE6SA2148141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec61fc355c5b322ca7e4a1692b6770a5fbf8edbd0b839f347dc3c578670d536c. 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/JPWP02202338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fd2a0181575557ca62d8d0af052bd4386965a9be687a2a14e2234c39f4d4a7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPWP02300816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550a9434a9cc8af3379ad53734f31fb9cca5fd8b5c8b706063fffb866bb2a32b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:09Z), 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/JPWP02300836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c26b4f9ad78a79f4ca5a0bdb218be180e74c051cc1fb6057158527b620e89d1. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:07:29Z), 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/JPWP02300852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56cddb6dda93fc6287065e71691730f008f3adbf2689771ec877f82ee52ba50. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZDA62418706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43135704907d5fa5126585454bf01e07a3ba5e77de3f0a537abbf1a063711e34. 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/QZTAX2452030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccc63ae4203cedd1950699f0e663980d9e0efaca83dae8f9d48ea6e4be18f05. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZPEW2561655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2217df42bcb921b00b8d47cec00c59c3fab55e13e64687526657e61e7e3e719. 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/JPX602000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aec7c9bf44ecb77a9a4783da470e434e9f9b530a6a2222c50bc2428bfe7d2d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6K2062858.