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 0x67dd0fd220316fabe1633b1749eecebc4bc0cca02a4d93709cc8677ff62ab304. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bae0dfb-333e-4f7b-8dc6-045770b4ccb5.json and https://artists.proofprofile.net/proofs/artist/2bae0dfb-333e-4f7b-8dc6-045770b4ccb5.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 0xeb686bae75e099bf43a806ba2e0566d6203999c9afc8648f91e5a9356b51877c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7N2425247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a317f35495d16d9674909cb7f9642480a4fba2e418089552fb0edea8329d1ae. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3F32488936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b414c3690ed3914bb22ff54b3a74bfc8682a378289ad4d1ddd1de6a9be622e2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES62589322.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49d51b15392892ec85950490fb7d5fc9f0479a091badb80be1ae39b2fdeb142. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:01:48Z), 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/GX38U2528223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fc1d203ee9b6203b12ee4a8e5ed868fed200878020ca7d81ee0d9a063324b0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6XX2505724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0327280795c8634c85664aa5388e9dfb11db27196baa51f480acb96ad37db0b6. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:12Z), 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/SE6XX2505725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c07907ab9ac7dbdc0c2f413a9d17041089601b65430908c64c004fce57d835a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SE6XX2505727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4638981f47445eec00fbebee202305e3fe83001dc67a49641217a8c0f57b16. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFQ2534516.
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