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 0xcfd543d9687081c89d0e996b209e95b703b6e867cd71ecc08dd9e44bce75c30c. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4d747fd-4608-4225-9659-febf5d07f292.json and https://artists.proofprofile.net/proofs/artist/e4d747fd-4608-4225-9659-febf5d07f292.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 0x56bea371a0853ee65ac6b10002392465bd5fb99f0d3c10284a19daf92fe890a7. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:00:49Z), 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/FR80W2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a71dbeca5bcd1677d19ba6e0ad893d290857b4211dbacbabb638304e590a82b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR80W2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af6d6c0ff868dc8bd79ade3215c8d6933233aa2b51276088ad7889d7942fa13. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:39:36Z), 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/FR80W2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c93ecaf5c1995a38cabe64b9fc9a33c6d1ab7b2a2a48bdc6ae5fde2907ffeb9. 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/FR80W2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07d9655bb6d3b15afd765cf9c95fac77a1038f5f14ae6c4b575c2118197f96b. 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/FR80W2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874fea27617228c5b53cb0c39139dc1ecec87900a19cb966fc4851c22294c698. 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/FR80W2400430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70918dd69869058513a758ac865d0d2b30bd2af7ff12cdd78330fcfaa2e60ce8. 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/FR80W2400460.