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 0xd71a58758bc9e47608a12c1ef532dbef077c696ae5d8e0411eaccaec9f923173. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a20c45e-78d9-458e-8ef7-0f36d8c1228d.json and https://artists.proofprofile.net/proofs/artist/1a20c45e-78d9-458e-8ef7-0f36d8c1228d.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 0x59ae15d01a70da4a6d706022d31f9550cf28ca792115951a6e3bf67e3f04f996. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:42Z), 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/QZS632370590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac76d32092a1c448d20d898e2d963ed484adb007511cd35593714e44a8dfe2e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZMHL2340174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95130f6e025100e4b8fc7647cd6e070e1edb199b9c7e22ae436d646be060e7b3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:09:55Z), 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/QZMHN2309040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd47046805d47f55275e607ec801022d0d931fb6c907c406e93e6832df4c12e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZMHL2303588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033850bff8c8801f090ec62a1499ab5116eae39e29f1da9e0d97f607ae347e84. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMHM2384772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e2d98c9c7673109bfd476494db9fec86199a457a852a33c7268adb83c131ea. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:37:53Z), 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/QZMHL2347551.