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 0x94a39f1754672e242af77c60a13398a048db2c0bedc5adcee2d2eefe5df677f5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49eb7613-d40e-476d-945d-f459b7b31b63.json and https://artists.proofprofile.net/proofs/artist/49eb7613-d40e-476d-945d-f459b7b31b63.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 0xd9c426504bd57844cd88be5bc2fbc04b78f93ef9c3dad6d7f5d17ee46c6b4032. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEGQ12000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676b55e2f160dda181760730e051b5b7c11c8ce5f048408a49f5318cd2b7d1f0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEGQ12000284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218bcae367a3fd5d808d90ea59a7f804b9aad8983fe58e1a6c5a918e332f4180. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:22:56Z), 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/DEGQ12000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90571d5e35e37566f4ef1c03cde241f0eeb2109845af5b96c0a3a45235dcd69e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEGQ12000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9a78a468ded7312463ab6225b249b7192e3856615a43850a3801963bfb6327. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEGQ12000287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34e3af470c3478b9d4fc639704b27721d586ab5784e89fdf3be49a7e74e38ab. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:26:49Z), 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/DEGQ12000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cb7aab811dc6fdef92bc035e7fea458558460dbd317737572537c2ab880326. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/DEGQ12000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf5575f05f07ec2c65754a5bbd572989ceb63d1a09d8c5aca5053c109388a96. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEGQ12100013.