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 0x6c563e748fc07b3e552d32ef1f876c7a197ca3c3f84a83a864220bcf728fbcce. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63f211ba-0d13-445a-8a74-6c9f3093bece.json and https://artists.proofprofile.net/proofs/artist/63f211ba-0d13-445a-8a74-6c9f3093bece.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 0x169ec5d4f12ea81981dd13a1778428a31cfe9ce27bb0c398b1cebfb2824910af. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:21:36Z), 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/QZDA62559626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169ec5d4f12ea81981dd13a1778428a31cfe9ce27bb0c398b1cebfb2824910af. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA62559626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87879f1bd997d690333a4343bc483ccc3133719fb10815bb6744af6c00fc93e5. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:28:55Z), 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/QZZ7N2438430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c024082afa396b60716eeaf9c8bbcc5a406e9953eb2a196bbd11704cc2a2ae0. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:02Z), 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/QZZ7N2437151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ceee01b37597cd4f064ed8b378a335124dfce03473a58d7175b7bdf6ef0df25. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:03:31Z), 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/QZWFH2466482.