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 0xdd66fd31b1391df9a0ded77f69379d1722d311dc6defaa0c268e8ba8b5ee683f. 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/f103eab5-3a84-43b9-b2f0-127e78138fec.json and https://artists.proofprofile.net/proofs/artist/f103eab5-3a84-43b9-b2f0-127e78138fec.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 0x5aacd8a615916acc069edd2c5dc8cb8c919d71f512068dcf409833e69827d723. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZNWX2482311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fab5145aaed28b898f23b19d2286a00ae1d3693c48407fe91a1b016b370d2a. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZTAY2474520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d3ce19ba17c94ab3a13fdb6624463f71602563ddd1e9447912a298e166447. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZES72518040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b811f203be0e55fab9b15191abffa0411a0ba6d54bfa04249eb5a3f8a4a8fb. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:31:00Z), 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/QZES62542962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10ffca01cedaa6e758e531d86cb6f2302242ca112e9370113f09791b7d193d8. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZES72518041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c6e9d488829c25b7d63fbafc4e90092426a7ba31e7ba0d0268e763857665f8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:05Z), 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/QZK6H2503607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb43bbe8bc87e0bea70ea25d87043fe0d8b2a5adde3c778a90e44de853a788c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEM2561622.