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 0xb9e5fb781e06763c68efe1d0ca6de881522c7be7817c327a2b52c1003aa7803f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a43dbeb5-cf61-4878-a568-a9e3a2df0788.json and https://artists.proofprofile.net/proofs/artist/a43dbeb5-cf61-4878-a568-a9e3a2df0788.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 0xe4eb3a4e8450b256301ced914ac2d584a545c63641f821b71d5e633a82bff831. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:19:36Z), 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/QZTB82403868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc63453c1862aa0f81cc79caa12a8fb7327aadde52b8cd2f3fd036e75b650c3. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:48:06Z), 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/QZWFE2486365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d03fa7014ce4829b9fb4b4956f1d21e161d3443fe530fdfee6ff73366f8802. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:04:12Z), 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/QZZ7N2420986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a358771ed45f07905c487ef299864798ce1fac1625ff3838c17b51c41ddc8bf. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZWFQ2423261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb67803c604da56b0635914641f0f4d92f4d22644ff77119f74df10607bc8923. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QT3F52531151.