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 0xfd57188b5cdb867a46dca02710c0b53570296e9eca41158803a8a9d705126534. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bdc428b-bda5-4afa-9f6a-f37296b9c342.json and https://artists.proofprofile.net/proofs/artist/9bdc428b-bda5-4afa-9f6a-f37296b9c342.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 0x08297c38eb6abac62396b3a7ef8430024747ba3b1742263c50741ea27b3c02c7. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:05:05Z), 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/USHM20332257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9197ec3a282b66e691b86bf72562d77380e90ec26865215d2fa632324f462852. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM20332265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39e04154d07e3cb409b0c51c12902c73e0a1016001d9a3be516d6f34fccdfa2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:03:53Z), 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/USHM20549391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97582511a3c65a1f1fae5fa91f0d4709f62e4c8570464f3da43ec815b952bb63. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:20:24Z), 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/USHM20549394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a72af1d8a5dba647ba97d1ed21096c8a111614ebe0aa2b032a43fc18b7c5d7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM20549401.