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 0xb2f39678789eddf66fb6e7e7e97d085cf41b05a184aa3042eab2724b209baead. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1d8d6b9-2232-467b-96af-6d6ba0d68422.json and https://artists.proofprofile.net/proofs/artist/d1d8d6b9-2232-467b-96af-6d6ba0d68422.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
SQ「あの頃の僕らは」シリーズ・QUELL「What Do We See／おかえりただいま」
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 0x874dbf9ba29effe7c30f44dcb1af88dc43cbdf75d6e7adc4e166cb7de6ab9ddf. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:58:04Z), 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/USA2P2464500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76218643af3b4bfcd43c95aa10dfc51c0094528d432eeb830cec5c6e6e0849a. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USA2P2464501.
「TSUKIPRO THE ANIMATION」ENDING THEME SONG COLLECTION
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbb2d5c2e9178c505d6e7400a92c107478a42b730165125974fc7960eccea31. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2444653.