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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d367f76f1ff20ff6a220d20baaf57cf5eeb7544f56519886c1b82670e4d423. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46116f3b-ca19-4ab0-a780-a845025305e7.json and https://artists.proofprofile.net/proofs/artist/46116f3b-ca19-4ab0-a780-a845025305e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anzu Lilia #1 ～HANEDA INTERNATIONAL ANIME MUSIC FESTIVAL Presents～
Anzu Lilia #1 -Haneda International Anime Music Festival Presents-
Yumeo Kanaete Doraemon - Cover - Mao - From anime "Doraemon"
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd234e5d8cac4d8ece312b17aad1ecdd4e385fb356580bfd4ba1306cad0d8d68. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPN821005061.
夢をかなえてドラえもん (オープニング／ドラえもん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd234e5d8cac4d8ece312b17aad1ecdd4e385fb356580bfd4ba1306cad0d8d68. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/JPN821005061.
Anzu Lilia #2 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
Anzu Lilia #2 -Haneda International Music Festival Presents-
Anzu Lilia #3 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
Anzu Lilia #3 -Haneda International Music Festival Presents-