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 0xfa65ac4c93a49101a8707caec69445fa5e4e29be2307e7700474f930c2c8dc53. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52e71a14-42d9-49fa-9fa8-9fb7f841a9b7.json and https://artists.proofprofile.net/proofs/artist/52e71a14-42d9-49fa-9fa8-9fb7f841a9b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ヨロシク・されたい! アクセル・オンSAYAKA
ブロークン・ジェネレイション ～フル・スロットルSAYAKA
Suteki ni Jingle Bells ('Cause It's Christmas)
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 0x3c18e403ce6300851735bd30b95a824ef36bbca29f69426c16cc2efdab83b589. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:06Z), 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/JPVI08200090.
Kibun wa Greatest Hits! SAYAKA Early Best
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15ba0209313c6e6190fc19d27dec8d83a7ee2fd1dd00597ea6d098c717f532e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/JPVI08206310.