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 0x2ecfcb62f72304bac0cf24a5cf1976133923e3331a7beaa9be4d0942aac690ac. 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/5c95e9eb-ce9e-4ef0-b607-089de7cde6a9.json and https://artists.proofprofile.net/proofs/artist/5c95e9eb-ce9e-4ef0-b607-089de7cde6a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozaiku Kakera - Official Soundtrack - Musique de la série thème de fin ''Code Geass ~ Lelouch de la rébellion''
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 0x3f9c604936e836da26c2b2b859ae4abafff2e195f965ba9049b83f19403e079b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:29Z), 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/JPN821002462.
Haruka Kanata - Official Soundtrack - Série TV thème principal "Naruto"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1ea321ecdcfd5aab31cb57964bf5a23dadc4cd4971284eb62be73fd3fa7f6a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPN821001202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94af50d93a447b4b518c660f7f9f94fc354cedc156d9a4091b6fa65f1ca9770. 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/JPN821004110.