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 0xf5ed98bd24724d68ee2d5d4cfc307991aea80fcbf81514fb0475db3db9c8cb6b. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c97fa663-be00-4a1c-9aab-ef2038c92fa1.json and https://artists.proofprofile.net/proofs/artist/c97fa663-be00-4a1c-9aab-ef2038c92fa1.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 0xba30e732418f366616efe4290f8db6b448bf27c8aa828cfeb4123fa8d6b6529f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:59Z), 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/USCGH1712826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3798708afd8b0f28523b71d8efdc3afb90cc8ae9a49376b8db5f7524551bad37. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ARXXN2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2721fda3e27968d3f9de752be90d575ee1440794cc1358a60d1ffe0c7a12ffc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGH1756684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee3a43cd367bcb03746e9f2195631bf3c096722a38715e1d2de2a2dda3accdd. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM81708809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcf964a56c70b08edfdebe6d0e16f078a4d57b9ceae57bf56e0172834927565. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:04:01Z), 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/USDY41951883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e1ab4578e8c4e88c604c73e3357e69b963d01586724b363d261fdc93538a46. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/USHM91905292.