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 0x2083573400c979b1780c827547dfe70af2b0f8f4c34d72a8e52aea1a08550101. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/589a14d3-6629-48c7-ae70-48bec6407511.json and https://artists.proofprofile.net/proofs/artist/589a14d3-6629-48c7-ae70-48bec6407511.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 0x64fd807978333dc3f3aa50f22f8b1b5fd937fcf74f589f47edb0d325d9eff46e. 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/QZDA52469711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed9681829295a8041259c80cddda352c39d80591171234c970b2ac0a78fdb0a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZRP42499176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70d8757ab05785037d28051f8c9cef46d3895e85b6a71e777f62031640f0e94. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:31Z), 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/QZTB52403878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40487055542bd423486a561c11a471edf5e75e4c9f6a034593f06dffa52d76df. 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/QZWFV2403116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdca2a8113e781c5ffe51a81904463cd576496d3f28f6f8da20c2d238c8a32e. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:53:25Z), 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/QZFYZ2535044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd675ab55988c5852955d15c3fdbdbffe3b79a0262f1dd3798e3385169c302a34. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZFYZ2535045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c86efd760e992a18ee223a8b0e2ab3f18269ddf22436203816765f3e372c18. 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/QZDA82585174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed87e46441a8413b7caf02c0348b85f5393aadd87c9f8c3b8167364f635dcf25. 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/QZRP42503475.