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 0xe095f8b3e78f59691a0b6b81613ec6134ed26926e4ed49032318bbfa63ecec1b. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbcd908d-7ee8-404e-a98c-4ec40bae3c0a.json and https://artists.proofprofile.net/proofs/artist/fbcd908d-7ee8-404e-a98c-4ec40bae3c0a.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 0x26bf07bc6d825d07563ed526ef8e3936f75502dc316e138f6d76b2811fa66ba9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA82340054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382a9724d781221da7de6f66cceecb61a4ac9e19d3dc1876ba76cdc08273eaa8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZDA82332647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a1a86a82a396879bc4dda4e7018d1cd600c94e3da11a2cf353177c97347e6e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZHN92354783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaad351ad2a79f55fb448b00dc64342581f2a07e794810e9c1bca71146dd6d63. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/QZNWX2306204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b70e2023cd2143221db361333c1f4bc16dd08fba4b594138716e2572a98ab2a. 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/QZNWZ2342257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc384596c4495f6c7994883c299b24cb628d22570cef7237fbbae2134cda5a75c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:43Z), 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/QZFYZ2478634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0010a728655404233b216bb1f845103ccf9297ffc103a0e2b551f8f173a4a6b. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:08:42Z), 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/QZDA52571500.