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 0x73777fe0bd8d6837d455304417f68d0df9237204aec09e4585ad2837c493354a. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da9a2d44-3aa0-4fec-a34a-46096281118d.json and https://artists.proofprofile.net/proofs/artist/da9a2d44-3aa0-4fec-a34a-46096281118d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Uso (from: "Fullmetal Alchemist: Brotherhood")
The Rumbling (from "Attack on Titan Final Season")
The Rumbling (from "Attack on Titan Final Season") Full Ver.
Knight Of The Wind (from "Sonic and the Black Knight")
Uso (from Fullmetal Alchemist Brotherhood) Full Ver.
Akuma No Ko (from "Attack on Titans Final Season") Male ver.
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 0x787dc8997533d0ba33bc4442d60ea9bc55668d721e8cff655b46c9902ff53108. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:29:46Z), 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/QZTAU2229636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090089d4045f9de8bfb7ed1173d2e79d87c4b3b0fd68f45e6017cea184b03563. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNC2357077.
His World (Prod. Xiyarent) [from Sonic the Hedgehog]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaabb573716c968386ca1a5fe583e68dfac1484aa8fe2684fa877247dfa22502. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZRP52409049.