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 0xf47ea33eef1dab24d4df7f39b9121c20dfdb97d354ecb7585d42bb6a5f1f6469. 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/2672fb9f-4fd6-49c0-b59a-82bea84acfe1.json and https://artists.proofprofile.net/proofs/artist/2672fb9f-4fd6-49c0-b59a-82bea84acfe1.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 0xa54410d895c3a4caa908cd24bce0ca2705a49f4214bf476dc33f5e2ee36e562f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:37Z), 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/QZFYZ1992976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3010810c88ad90a0e189ae984004d08dc000043e767588d946bafbcf56ef74d7. 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/QZFYZ1992978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61203f6aef7b81a44688ae4115f856a3e73b2c4cdc2dbb67aa86b315f538417. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFYZ1993564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912a6d6616e70e1918dd886a3c4055acba3f1706ade28a4efc0d26b8dde37faf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYX2253180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130a318f8c05595a0901d45e769e2d865986ba104671f3ebaf57caff4ab46e20. 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/QZFYX2253181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad6529c4110897107da29535cdb1119da14ceda16f43be73b0e43ae677207c6. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:35:17Z), 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/QZFYX2253183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5714fb11414fe1410d8dfa7bd1c78c9e85ba429c902a1b3ab3759366107d3feb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYX2253187.