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 0x6d1e5876ab18a1f9339ea9214fe584674679ac1c4658c8beecbd56226c75b938. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2efefa3-4bb2-4961-b9da-c1468da4d8a4.json and https://artists.proofprofile.net/proofs/artist/d2efefa3-4bb2-4961-b9da-c1468da4d8a4.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 0x3126fc52f1f930065b0ce57a02cdb5c205ca057f5c73aca9d43d0f4dffb1f7a0. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:58:18Z), 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/US25X2301940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc110fb9d8e6201b7a89418b49166a1d162dbd499349dace280629046711a12c9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNMV2401270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bc4c913aaf0d83cd5685942cc7dd162ed403a630bd24dc542db0621eb8291a. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:17Z), 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/QZMEV2510226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dd15eded6f2c9799faded0781c9fe2dcec8f1fba939a1e9ba075ff2d0d7f57. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:35:41Z), 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/QZMEV2563891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790772b791ce00034734b54eb76d4a893882f013ccfee35ae5d49d909ed74a45. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:23Z), 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/QZNMV2596935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fac89eca3ee7a588421d1f3c7bb9251519f1e6c0fc04f4191a9d7241a87929. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNMX2538524.