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 0xd03557c6d1ecd0248d5ea7fe181759e1a22d27e364bf90e3758b2a88027029e0. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d58dc254-cc6b-4da8-832d-15ce9f661366.json and https://artists.proofprofile.net/proofs/artist/d58dc254-cc6b-4da8-832d-15ce9f661366.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 0x2c04291dca8ae323908857b4089d58fe88f8da0cf6a2b7026a4527ff75a89d2a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:45:00Z), 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/USHM80525974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53afa679f467069397853ccee906695d310671647d9f6d80b443356d12ee644. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM80525975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53af3145dc5d34f41df10611d4278ea24efc4ae008b4ac3b887fcee55f22151. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USHM80525976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d24b095fa042ea4ac88a332e5ebeb8d1976a4a85527d76decb2e6baaeafeb6. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USHM80525980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653255b58a8ab58a1077d6ed70fa379ccbe66e3e8aab66000dc9de5626862388. 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/USHM80525981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921e905783c796d44ec651130f6bd1483db04e17da41a4d2eb013306237ef76c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USX9P1047507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b43d9eb398808ac309b59aba5535d101dc704ff3671e8d965bfcff82da7c95. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:49:29Z), 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/USX9P1047510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2270bfe8d37222ad3babcbbf8ba2a086c919cdefba01fd080e73a474d68172. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:08:42Z), 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/USHM21340716.