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 0x20c1e25658f8a259d8100bea39946957335a99c8cd75e71453a33267cd7d6da2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/966639de-b5b1-49c6-9054-fe451e45d199.json and https://artists.proofprofile.net/proofs/artist/966639de-b5b1-49c6-9054-fe451e45d199.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x9964c19b44bdd6903064c21b02001608229402fb64441f6f9abf2d0d118dfcc2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:10:33Z), 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/USI4R0806891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada3656970d07e299217cdfdfa8e180513e7341031a0c8adbfada155a2749a8f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:47:33Z), 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/USI4R0806886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605d113099416045a8bd81eae962e49efadceed5c7a84b1fc2d6f028336d15ba. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:29:58Z), 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/GBEQT1300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258bfcb05c0c53d168ae2d9b796de2b5776314c86916f982f9051a09e12ba572. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT1300018.
Pal Joey Music retouched by Takeshi Fukushima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1973c39f99cc51acfd297cabd01fbf600cad69e262a4b325044a1e2d8a43d5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBHSF0800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bf8d888b49a63f06258b85741c3d383b87c7c7e8f60c41d324b83c9851ffdb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBHSF0800112.