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 0x5c9cb6c0f6bbd300aa43ad8a6e5c89b72d8075e3675bdcf8456cf36cd4cb9e95. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c007c2f7-3901-4d47-b74c-11827079c6c7.json and https://artists.proofprofile.net/proofs/artist/c007c2f7-3901-4d47-b74c-11827079c6c7.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 0xe65e8fa4c8aefb49bb23cced0ac09592d600b1be6f27a025fdb7ad3ce6c6524a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USL4R2380179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7742db7c7f1705ef974b6ff1487824e47299e789aab68d73f18cdfa0e007ff2e. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:03:10Z), 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/USL4R2380180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2ebf4dca8216c335b5d1e9e5cc4778fcc71b25fec16d0fa54a06f09634898b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USCGH2565613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94eb57fc96f30a0d709c57084f68d762faaad8c6410d196c06fe281012115d28. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:07:34Z), 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/USCGH2565614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1394ccc068fd2eed2761bc57672c853f14b51fa0072ad999ed1d089de1cee15. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGH2565615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f5f7519400921042b46bfe51a2eb7a70711f4b7b1b7d92c878fbc0effba677. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USCGH2565616.