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 0x231c0230cc63823ec0eaae52dec263bd7bbc882a5d1c1aca1b3f6abcc70e72ea. 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/c9b27a3e-944b-44ad-b073-8e54480932a6.json and https://artists.proofprofile.net/proofs/artist/c9b27a3e-944b-44ad-b073-8e54480932a6.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 0x296ff4be33f1f715e8c2c62280008a94a761aac469dc92e3b263528935f06657. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:01:00Z), 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/TR9271400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a214f1f2501fc2cbba2dd8272e2e90d7599383bf3eb834edaec0cebffa71b24. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/TR9271400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a2700f9d56cedd9094739079825a5e4e216f832500f739269629ad5df2a0b5. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:32Z), 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/TR9271400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e61e9fbd026621b8dfb60ae36342788d789477be6521eb936a1ac038e4326ca. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:48Z), 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/TR1751001681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9839f5421648313caea5e2946f682dc2fb842d3b025b7a14afff5401872ef982. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DGA0S2448107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f85aaeb2cee36656c57ff7efc2081ca73d679d4af491c66a962a4647fd7f80. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:48:18Z), 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/TRCDL2500062.