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 0x2c06c3fcb16bb179f9f9af71b0d74ce9ffbb1b67d8f8f1ac63d9a9992b35ccbe. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1693394-b8b0-4de4-94c6-2e096896f5b5.json and https://artists.proofprofile.net/proofs/artist/e1693394-b8b0-4de4-94c6-2e096896f5b5.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 0x30cfbb64c0bdd65697fc51dfb47e2007731b24df329e947c77e4eb633c40b565. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USX9P2485536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06024814f4f920f9b052ba265d063b517ce024165ceb4713ab6fe38fb46f3987. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USX9P2485539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e0ddb36a94d0ae53290972e76e09f0d727f7686b216328d9aab943b16bcbd8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:05:09Z), 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/USX9P2485540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc087c0b1bbad6f94347550241eb896c2a4d7837d572146dd3557c2aeb60ef577. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:34:38Z), 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/USX9P2459745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f16074e7568a01ef2277b33b6313b5ac377205a166f6f5dc2f0579cd1df76c1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:35Z), 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/USX9P2459757.