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 0x6c7032b74c789727208c2c28d4e3cf1fe80f992ffbeb28d1d6fb66a5238fab87. 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/2ff7d6fb-13cc-41e4-96f5-e0265e539917.json and https://artists.proofprofile.net/proofs/artist/2ff7d6fb-13cc-41e4-96f5-e0265e539917.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 0xb309707d56ace3b34be2d622174bb61af6e4f302ea504ee6c910016ffe26019b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:52:26Z), 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/TCJPT2252357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c378e96e1fd4e02c94b7ae3c7e1d93312aadc77f872a5c4ce822726b487b71. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCJPT2252362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdc678792c6ee9597e9e00555e9ef5eec84d8a5cbea5020fc04b7a2f3385746. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPT2252363.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0e65bdad45bb3b0d16f2dde6acd5427c6075a43638234d15e6054567247435. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCJPT2252342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb2a450fdfc67a07498874dc2413e6b6bcebb3c5c594df8c86ee1d126b2be84. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPT2252348.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74906da3c058614730344c40c6bb5dc12901a1dabc3254122647def62d661c7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCJPT2252290.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d1ebc92fe63ea6922c4aed25f9004a0a9928e23e1b82ce8d15bd01a7e3266e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:12:29Z), 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/TCJPT2252145.
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