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 0x34020b908bff8ce0dad320c9e190fdc6e40320e0bd9bf7e752f3e1462eda24ac. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c9e0ce4-8c9d-48fc-98e9-9568d8a08a29.json and https://artists.proofprofile.net/proofs/artist/6c9e0ce4-8c9d-48fc-98e9-9568d8a08a29.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 0xb0c23005b667544f94cb5d61923348beebd3a14c4eb9cdd90fe135fe5be45fd4. 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/QZES81974203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fdb6db59cb080d6e96b6911e3b61eb9779a461c492e07f2c7b78cb76c4167c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:10:19Z), 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/QZK6K2451687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018051aaedd380938cc0f422f23e5bdd1b1f192cc3ec620af9d20eb8f612b1c8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:51:23Z), 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/QZMEQ2470940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492221a6a5eccb314020a257b838cb2273a6f0ee486a3297b716f1a1e0536a7c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:00:19Z), 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/QZNWX2422163.