is a Japanese company that develops electronic payment services owned by LY Corporation. It was established in 2018 as a joint venture between the SoftBank Group and Yahoo Japan through Z Holdings, t
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 0x4732cba100cf0dcaba30142af008600facc54e93ac031e6ebf123f0607280c22. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed8d866e-b324-419c-8b7a-d03fa38dc8b2.json and https://artists.proofprofile.net/proofs/artist/ed8d866e-b324-419c-8b7a-d03fa38dc8b2.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 0x3b5f3411fedb88b9f7abeb1b52e06676dab6e4f0f29ef8ededf4a5904a7a4f08. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHN32412190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed7bdd224b7b7188c304ee77b178f07ecdd7f45e10d96536b798b05623ca28b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAX2440407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a1c908492d0f04ef23a7ff241336a67aa9ad8c7877720738c4881d1139ea14. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:26:18Z), 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/QZTAX2417657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5f3411fedb88b9f7abeb1b52e06676dab6e4f0f29ef8ededf4a5904a7a4f08. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN32412190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f053d5d71b6e5dab7270ce2f4213758878a28977407043e8fbbaef8e1294428. 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/QZTAX2440408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc65960ca5b9723b64738c44dc19a9af9d32b18b0f369a859953e897ffe3943. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:54:58Z), 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/QZTAX2440409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc514483fd6e97f1ca7720b351758a40d43d01955fe6a673717b985ff7a0e7a45. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:45:55Z), 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/QZTAX2440410.