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 0x90b3b7f6396149bea8527ae2344f41e38b02f5b1e32d7bcaea1c7be6606f68c2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e629ef61-e091-40be-b47f-d0e39c32ca0f.json and https://artists.proofprofile.net/proofs/artist/e629ef61-e091-40be-b47f-d0e39c32ca0f.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 0xcffe882e48811d60ad0fee2e1111a6c494cf4601fa01731cbab085a19e6365fd. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:23:19Z), 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/TCAFO2173014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5eb4dba88ba9509e8053b00db47de2afd5d814e9672e7a239562e755415cc0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAGM2269321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a6f518d3e2548d7f88c02620fad72f8c56a1e067dcc71fd95b447dd49056b6. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAGT2337910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c0fff01db4aa303c5f6362cf85fe9a6609be7ab78f96d219e110d9d0278ef0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:39:53Z), 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/TCAHX2411896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf179d3ff8e74048ebb524b29778e8a896465a3873740ae2edee342051a8c6ba0. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:57:39Z), 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/TCAII2472921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cff9125d1b9c8d2f7b96c879ff5fd80eed17a47c1df7ff3f0db14065e58ce3e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIZ2434804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc6ef2fb53e742b54ae55d63d97606da3df1494cd578fb5acbfc8d580afe801. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:45Z), 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/TCAJD2441054.