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 0x45f227c84467308b7324fe97b456b5f5061bb33657c9cd29599b9a649d66a078. 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/e43e44d7-97c1-4a5f-829b-529f6f55d39c.json and https://artists.proofprofile.net/proofs/artist/e43e44d7-97c1-4a5f-829b-529f6f55d39c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
MANDY B.BLUE #1 -Haneda International Anime Music Festival Presents-
MANDY B.BLUE #1 ～HANEDA INTERNATIONAL ANIME MUSIC FESTIVAL Presents～
MANDY B.BLUE #2 ～HANEDA INTERNATIONAL ANIME MUSIC FESTIVAL Presents～
MANDY B.BLUE #2 -Haneda International Anime Music Festival Presents-
MANDY B.BLUE #3 -Haneda International Anime Music Festival Presents-
MANDY B.BLUE #3 ～HANEDA INTERNATIONAL ANIME MUSIC FESTIVAL Presents～
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 0x2ddacbc24c90720f7fc7c0e36e882367530bd5e1eec78f78c316fa04cdd9887b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPN821004953 — a six-check JSON result.
MANDY B.BLUE #4 ～HANEDA INTERNATIONAL ANIME MUSIC FESTIVAL Presents～
MANDY B.BLUE #5 ～HANEDA INTERNATIONAL ANIME MUSIC FESTIVAL Presents～
MANDY B.BLUE #5 -Haneda International Anime Music Festival Presents-
MANDY B.BLUE #4 -Haneda International Anime Music Festival Presents-
MANDY B.BLUE #6 -Haneda International Anime Music Festival Presents-
MANDY B.BLUE #6 ～HANEDA INTERNATIONAL ANIME MUSIC FESTIVAL Presents～
MANDY B.BLUE #7 ～HANEDA INTERNATIONAL ANIME MUSIC FESTIVAL Presents～
MANDY B.BLUE #7 -Haneda International Anime Music Festival Presents-
MANDY B.BLUE #8 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
MANDY B.BLUE #8 -Haneda International Music Festival Presents-
MANDY B.BLUE #9 -Haneda International Music Festival Presents-
MANDY B.BLUE #9 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582de7215d394871553ed5c3ae9e9fc2ba03b9884baff05b7d0c716bc2038ab6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7U2452054 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c53d50ea4b5d5e1b6563e1095442186436efb9b7b97b76881ed15cd6225802. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT66K2528196 — a six-check JSON result.