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 0xb50f8d23bdb4932cc955bda8203ac4f9887389bd68385e5e9e9643b429f088a1. 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/740d874e-5334-4e8a-8d7f-834c709fca1b.json and https://artists.proofprofile.net/proofs/artist/740d874e-5334-4e8a-8d7f-834c709fca1b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xaadbeacaade02328b67eba32e852c708219d11c494893013f6721e5575d47626. 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/ITLU51808726.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c20a38299aad10ef29d401a71e2b67c040f0242a798e76e8214e75f8065dd3d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:28:47Z), 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/ITO101833400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb131b629687f3a63ac015fbc205bf07b979eb8798325bb4ec8e3fe7c6e5a22. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:02Z), 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/ITO101833405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a55824dbfe987439fdfb8489e68a404c87a38df477887b6db31edd56cdf9642. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ITO101833416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cef312e4068a547e15506378a1fda2145488eef80a50e81f716741c43b310c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:59Z), 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/ITO101833424.
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