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 0xbd65d27eae3ba2cb5e5460a45878ad3b13ba5264d4986b8254c4e60f811a279d. 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/4d626079-9613-4677-ab28-5d8d25ca3a9b.json and https://artists.proofprofile.net/proofs/artist/4d626079-9613-4677-ab28-5d8d25ca3a9b.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 0x716338d2036a18b003559227b89f536157ff1fba59aa91699293048f625aa7ba. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:16:53Z), 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/QZFYY2469725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4123f7368164a1ba1e3e6237113d855147e192d53427eacf2859452f9037c072. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZES62495509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994dc836166ab3e2b93b0d3aa2de742a16d499c651cbe814ef5e6e6f47fcbbf0. 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/QZHN62440535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119c25d4a40625e62c1ccdb8ae0e9f11b71f5d23576e1148a52e2f0f7e93614c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEN2436526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4015f1dbb00b609342c1e7559dbe101021859e871c27c4ccb787283d02c8ec9f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:44:57Z), 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/QZNWX2415442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8974636b51fefd3cd3545c521f6f1b52481eeb640b57526f70e094280bea08ec. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:31:45Z), 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/QZTAX2419913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fed2f1a1d0150536c30fe16ac89413dba297ed31426ea36d17fd6d0e505e5c9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFP2477634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ee54dc122af9d2d9722943cbe4f9fd541a49b644df192cc22e15b0a1d4021e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3F22411716.