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 0xa0fb0cc7fc7a9da30bd58591404f0ef9c57e1853ac61e65dc9024dfcb073e527. 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/f51259ca-1160-40ec-8b81-400acd418911.json and https://artists.proofprofile.net/proofs/artist/f51259ca-1160-40ec-8b81-400acd418911.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 0x62658659f88c25012ea24c9f79cdb30758cbd75e82db2c57fbe51843ceb93767. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCABQ1374039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e1ffc61498f81b6e2e5cbfb79729719abbc2fedc8c4d2bd2a7504431aa429d. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/TCACA1419676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673715abdfd80735db1d62d2979c0ea065711fbbd5abe2fa6d75431be14098e3. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCACA1419685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb749ea32acaff3c4b8588add3b5eb8170a0e969edb8394acd8c7cecc3bd5aecc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCACA1419686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cb7d2167478d21f9c29fa8daa7466416fa7759912b38fb641510c71ac75184. 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/TCACN1657035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bee0ab62d4dfecf615b56ac61be671455129934012633691157d87bab451aa1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:30Z), 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/TCAEB1978821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af862db8145f8cb67c9eef5c2696408ccb0a041ef48885111613b21ac782ae1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:42:48Z), 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/TCAEB1978822.