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 0x1ed2e9741033a0d5eeaa912124c7f745913efe4e3aa771dc5c72c263fb4f413c. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7c983e9-81bb-4dd5-adf6-0b5430c4aed2.json and https://artists.proofprofile.net/proofs/artist/a7c983e9-81bb-4dd5-adf6-0b5430c4aed2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Reba #2 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
Reba #2 -Haneda International Music Festival Presents-
Reba #3 -Haneda International Music Festival Presents-
Reba #1 -Haneda International Music Festival Presents-
Reba #1 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
アンインストール - アニメ「ぼくらの」より - 石川智晶
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 0xdf3b20be720980f1665cfd98a34b571076c31795c5f50a1ae606315fa61583bf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPN821006950.
Reba #4 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b69d91c7bcd209c31ebbd3b343c3866ec4a43977096bbbda631555c641d9a2. 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/JPN821009447.
Reba #5 -Haneda International Music Festival Presents-
Reba #6 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
Reba #5 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
Reba #7 -Haneda International Music Festival Presents-
Reba #7 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～