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 0xc01529f79a7a053da5208eb027ffc545ba61838a09ae9354047eda4bd2eae4ba. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9a46dc6-072d-441b-a7b6-f588124a727e.json and https://artists.proofprofile.net/proofs/artist/d9a46dc6-072d-441b-a7b6-f588124a727e.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 0xe630766cf896f149877378e9d4578cd24138a8e328011e9533517a63bd1d2ce1. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:08:40Z), 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/QZDA82210582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11d6a92c5dddfb8b040ac5d1fbfadab20695d936cc55319a178ded69de28cbb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6P2214309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a4704d8f6511d93e6b32766a2d54e975077b98fb269b48c12f266c1f5955c8. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:49:39Z), 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/QZTB22328283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776ffe91e2f734054e1adeed8021b9e50f6344073720683e482f30cdc30d7005. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFK2477476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3866f0029f427710c3ecb04a7880ba951327b0a2cbdf639725580bdaeaf9adc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:45:40Z), 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/QZZ7U2488657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33881162a282769a7bcd16aa2778a04cc3b0d2aeef22adcf341199f606dc44c9. 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/QZTB62552421.