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 0x2d6a94235193a0fde6005dbe169cc22bcdc1517bc834d0fa302e6a67ad95b57c. 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/7f692e74-a649-44e0-87ae-8bc01787e450.json and https://artists.proofprofile.net/proofs/artist/7f692e74-a649-44e0-87ae-8bc01787e450.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 0xa13b1c0bcfa3978b5dd3afe84d2db94a8a49a76556e8253a5a40759498a1c3fb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9W12422767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47276efeafd3593122fc62d6369e8520feab2a94a2587f50ffa1e87bb90b867d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:57Z), 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/FR9W12422765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22904b1f5afdbf4da7a56623de70e621be6816bb52c92e21c496f0dd6950c13. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:15:49Z), 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/FR9W12422766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13b1c0bcfa3978b5dd3afe84d2db94a8a49a76556e8253a5a40759498a1c3fb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9W12422767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c18e66d38be4811eb338305df3e11db37b3e7665e65795709db4f3217607d39. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:05:26Z), 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/FR9W12453792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33da30f1a248650df1bbbaeb5533832a08da33a1edb5c5b07e17b8a9b8901112. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR9W12453791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca83ee9f62868afcf43dce6c149be00e9c42817d9e9673bf38909abd08716de. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR1A92404816.