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 0x5f7dfbb789a9adcf969c776ea7cbf990199cec92a7af778947aa4793292f3e64. 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/7d8922ac-a13a-4135-89f5-1bbf4f017bcb.json and https://artists.proofprofile.net/proofs/artist/7d8922ac-a13a-4135-89f5-1bbf4f017bcb.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 0x513c962c234650b81cd5c8b9579c0deed3e04e7a6b001aae5023923cf89f0d24. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AUOKE1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6702c945271ccc74f4ba735d6e67529e0eaa63e668987d9fef9bd5e76160f864. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/AUOKE1700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9d01c013c06083a624ea34582eee5f699f54fe0f830e0aa3e0a44264db89b6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:32:50Z), 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/FR96X1894804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5566d29724265d522b8672206f396717877bff6a9fbb0650064d9b1d49b02d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:43Z), 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/AUUM71801113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d611414d100f97fe499f0bac6e6606ff9a17aa6f337864dff6fd1c8cc1497c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM4TW2088329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee6dedcc977c2e2dd8d5cb1e37b680976d483916902f4930b0099e4e8055a14. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUDCB1702277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c1e6fa8b7aa36319889ea287a2893f241042492e717986d3695ac217111712. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/AUDCB1702301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64059d3262ea34eee8da2044a404c40969ba012423923dd4ee71968d53d92052. 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/AUDCB1702362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bbb67dc455cae2a884f6f2e2cce4ea51bd5d068cbec2e39db17dba2d0a238d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DGA0L2455601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad1fb7d30255df6cbafd70c0317c3915d316a3120c15e248b655591f70662da. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:41:02Z), 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/FR10S2567140.