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 0x42ae0e9878869a1e7aa4eb4a0e013f1560f90d46666e65785af4a8914a05600e. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b101ee7-cd5b-49eb-a7be-b9061f6c65ca.json and https://artists.proofprofile.net/proofs/artist/7b101ee7-cd5b-49eb-a7be-b9061f6c65ca.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 0x9e36a505a8d67c42785d3132df8bef5ee344ebe80e7ea68894bda8a85617d5fa. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZDA82533719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ed0c506c63046d55b0995dec9718efb58441b9a9894fd17b5bf0e478f46276. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:52Z), 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/QZHN32544401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e3a8bc84fa4d0572150c3575d6ec86db3b1fe75170ca8b168ccf5e551e9027. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:37Z), 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/QZES92506923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704a6b0cd3876546e7c7dc3e3e0a5f602b5cefe784a077ed4c318fd1dde90dba. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:28:23Z), 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/QZHN72544545.