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 0xa89fd6e4eba8427ad9eeb7330a146bc2afd08c37ce6c642fc5e2935400859f21. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12db795b-cd7e-4ae2-b8bf-42a93bd9ed93.json and https://artists.proofprofile.net/proofs/artist/12db795b-cd7e-4ae2-b8bf-42a93bd9ed93.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 0x693cf5a092893f1de1570f4499b455183d6a2544a3dd76d2934f59c39a858a8a. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZMEQ2410182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1d7517f48dc8fdce2f72233d7f196fe3709afbaea3c9fa7d8241a7254bb52a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES72586058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb125c11e8508eb00a24d9e0e080f626240780dc72649ca777732fcb67263ecd1. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:21:31Z), 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/QZES72586053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4a1324729e11fee08ac36e06d12b31548a24be239c1c8c1a1bfc1e5a594794. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7P2452016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6bb7d3850965a8976d79cdd6d85be0957d9d7a159b25cbb460ab4aed014c44. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES72586057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aeac849163616c5c77b23668fe65bd31b9970524fe3701161652826d676858. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:58Z), 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/QZTB32542790.