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 0x06abb1a9c36f666cf4ad8edea172914281d167ef3445363f5a82108a54d228c8. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75a8a585-a29d-4aa9-8d64-cc53a65451e2.json and https://artists.proofprofile.net/proofs/artist/75a8a585-a29d-4aa9-8d64-cc53a65451e2.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 0xcf318b1264184ab00907a11042600074f220d8f8e6e9cc1e6f8011d76a5afff0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:55Z), 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/QZWFR2358593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11965f8acab860e5535e7ba170fc00b01561cdb892f4f914a0d8b61b98f6ead8. 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/QZWFL2371986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ded25ad7b25277da07ed0ef9ac5d5b8d343bc07e29e69af9b2dad4e98cbabd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZWFR2330787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b19405a355879e924f0a8a372a69bd2a65ce5294f2900298d59bc98771150f4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:32:20Z), 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/QZWFK2396819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b06be13b78228690be2d914c52faafcdbcc9b1c8db38c4040bae819eeafe5b4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN42404127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4501bb1b120a4b6b2d464c5b085c43ad2ce15186462cd6d4b411998cf8dce46. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:41Z), 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/QZES72427903.