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 0x10702ab6eef5aad496e464cd396b3a69ee432c55f3049fd362ba61142449222f. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfcda87e-10ae-4342-a22e-d699f92e61dc.json and https://artists.proofprofile.net/proofs/artist/bfcda87e-10ae-4342-a22e-d699f92e61dc.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 0x3e7447c3521ccd0fc5a3145f7c45f6d7beeb3692bc1dfae217c40d83bf9329b3. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:03Z), 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/GRGM12200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31879d8133a3b5d9c5d7f19c02b3aac8dcdae4543275343dc5e05817900890e5. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:42:01Z), 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/GRNX11300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b44b4a725eafa029dbfe337e417e3fd8ea1b75b77b6d480e0fa45333ae60516. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GRNX11300247.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf222ae1b19e1c4eab11e5c8ca1cd0133bc6d49b28d1e769bae851be9caf6a5f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR96X2243599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957620dc5396ac1e931936df5635a36b96a83020b89040f16e032eaba5eafc10. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA062379972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db0ab0d2db3564041bb24f62942842ea5111803a91ee7c8e5a57fb4f580201d. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/GRHV12400441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5721204c93c3b5f9e187f2893d48b766f861e4ccbe8ad8457d29564e108001. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:39:52Z), 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/GRDMM2500849.