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 0xcf42ebf01572765571e9e17aa2a85a43f828177a5081ba8e1e2194610bb51c26. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83e594d7-0c7c-447e-9545-dee2329b43d8.json and https://artists.proofprofile.net/proofs/artist/83e594d7-0c7c-447e-9545-dee2329b43d8.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 0xde9906b79471bc4eb11d1416ae409df3668ade41097aaf5af239ff00b3221a44. 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/QZHNA2362759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10925d512e1c70c1eabdd9e5b97d22c5365dd140d64ed008558c2739d23af1d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6M2315032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef80d65954d211908dfcfcb075c21b1a5503f7049dc659ef82c51a05f664e93. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:02:22Z), 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/QZMER2323497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf530eceb72c2d2df0eeaa12cb00c63b129284fc1aceb9d2f26ca409c0f8753f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB82331073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7b09b5eb761d1488f6e19cab97830ad9d330746c7a5cd1dd6ef0cd5fb9ad86. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:42:02Z), 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/QZFYY2440246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0488110cd05632b9cb5aa496af62386bfe443e8d02e7720fb04acca2954715. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ62454575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c97a3669293e3b77df329ebbe61d970c0db7da6389109857b626651cef515f8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN32444652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe469191db55c144270e8833007308ba18cd276dd03889aaac62a556c4059ee21. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWV2579757.