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 0xfdb75187e89d7ab0b4dfbe2b9f8b1d7fce7011c3e881c4f99001519037684b0b. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30876ea6-57e1-4fd1-9d2a-641d9f60e735.json and https://artists.proofprofile.net/proofs/artist/30876ea6-57e1-4fd1-9d2a-641d9f60e735.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 0x5438f17082f57d256ac6bef77301a8eee272225066f049724f747691a8c75c0a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SE49G2400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad1bc483d976df9190e8ba3b660e723c52dea7b1c8b4aa94cdf67e788023d12. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE49G2500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72904f8853f289dbd7d34e430a713be6fe960d8df769eb5269865708b4be0171. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:01:22Z), 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/SE49G2500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad1bc483d976df9190e8ba3b660e723c52dea7b1c8b4aa94cdf67e788023d12. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:45:40Z), 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/SE49G2500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f320e0e0ee46ead4ede2b3ca27451c78433024fbb98db0637a63bee5aadf04. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE49G2500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3194477f55bafa13d75c9ea6e7a823ba723679e4585029ca7eca5b72def932d4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:09Z), 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/SE49G2500205.