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 0x8eba477161beaf372f8fa038b9360dc51c058f556bfedbac5be4c34738beb796. 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/2f626598-2de1-4cee-8b17-f831cfb1aa5e.json and https://artists.proofprofile.net/proofs/artist/2f626598-2de1-4cee-8b17-f831cfb1aa5e.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 0x50ad08fc996b1b2b65421bde4b32bafdd1fb40f9b7e02859344bf5b98a9197c3. 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/QZS642567534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220f748fc17b8728f71f3e44cc3838e2aafdc16aee59c08d75f7f0980f63e1a6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:42:37Z), 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/QZS642530253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e5a430ffe8f55aa496e90a6a410012d3dc75403bb3a09c509c37e7f4c78688. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS632557619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71434f9c5a7c533ca1206253d819a10e9875c96407c2fa2f5d1cfbdf730b609. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMHK2567281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bce2135925193fd26656693a7c421d352ea89918a370bb6d7e2179ebe689c2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM42K2531909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383cbd17706868ce79706b021a38660edccf15ae186402e117209d7c5ed1baf8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS632548407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a57e193628b9211bb73e6ded31d118392ba2b7351fe6d8d561445e8c3a302e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMHK2504433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe1fe6e6acb894bbd568f7ed32a6d58298d9f20f777746c5e1374d6e9c01cd2. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:06:10Z), 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/QM42K2567961.