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 0xf793191b5d6ddb906931ab6996d5aa65fb9b1ebbb3485ee13111ad5488aa1d25. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/242c2537-3d61-403c-b1ac-7361af825942.json and https://artists.proofprofile.net/proofs/artist/242c2537-3d61-403c-b1ac-7361af825942.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 0x87bc546715102d48ee18ddb3908b4f2c9590cde48d2bc8686d36495e9af0f458. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFZ32183341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3d20906102908080027f75555d5db6eaf889e4861b90393b1fd2358efb57a6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:51:18Z), 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/QZMEQ2217754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524af912e0da68e24ea4b74fe2ce7db141f84d25b05fb34d0a09392309aab34b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEQ2217756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4fb3907f7588a0af09142e461b98860c37e561944d64f94728f6a150b97689. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZMEQ2217757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea795246b86475f8d1a4ada8cd1ae6e670fb4836751ad7878161b92e9eed8654. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:43Z), 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/QZMEQ2217759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8114b66cf0af8c119fa27f077236b721143bd7a710b46e7af445ef223f90cae6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:39Z), 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/QZMEN2265435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a65945de39bb9bb09b6e1cdf0a898d0d97a4afb1470799db08029b9aacc44b. 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/QZMEQ2217760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d61427003d9a9ce2eb829e31ce49274d2c789452841ae9cffb41b073545e6c9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEN2265433.