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 0x621ead9a37ad0f3f21f9a12146e1ad09e81f5820d771694371175a560764d856. 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/f73c7147-03dd-49d7-beaf-33d1be0f34a4.json and https://artists.proofprofile.net/proofs/artist/f73c7147-03dd-49d7-beaf-33d1be0f34a4.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 0xd52371a3287ed7cb891342acc8b1a976bb2abf2b5293b9a2a13d902c56936711. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZYHM2422849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0d2c9af1ace584420d99dacc1f770bae84cc86b45ad05d173970e05e1ba6a7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZYHM2422896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f0a91ceebef4a3362e1d9bde640bf6011fc84c2aa800355d6834e07d9ae4df. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/IDB772107582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18ab16570cd0c5620f0d7c7310003daaf5b425507059c6d10cfc94d62f6efd2. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QMFME2401505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf357f4cd9825d97a4d90febcad624f2380d3556ca81978314e474b9bb2d1a1b1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IDB772109579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2875c460ef3035362784c667cb600d3ee0bb822f42031ae194d7ec05aa73adde. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:59Z), 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/IDB772109585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7cd43186ca857d08de09abb6872a258b6311927c66674fa920183252c4fd2f. 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/IDB772111447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250ac93ccdf3a85526e851273f4f7e7860fece9ee529513475fbe8805da59174. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/IDA442402772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff4586736cc092c411b09852e19a91780854b3cc913db9d7fdce83cfa268713. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/IDB772114544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf544c008970cb52f84b8cc6069aa64023a1f1d42ca6c508690d51b435abd9f. 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/IDB772116375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1401ec24f0a1e947509bd27842b7536cf61bfb77ff85f4d1ff0146a35d163c6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:34:43Z), 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/QT6E52520958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8d99d68271dd49172590430f9885480da9cc3aca8abcc35c7a470173f9625e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DGA062591797.