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 0x8f49380bf262aeff5797faddc9e3f82e2c1373315c995fd083aa4fa7c482458d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdf9b937-6d60-4882-be80-c8d2181ecc96.json and https://artists.proofprofile.net/proofs/artist/cdf9b937-6d60-4882-be80-c8d2181ecc96.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 0x3a65fea0765a0250baca7ee039db5e5cd10a5ccf078f9dba08ee0d3831b925dd. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:40:38Z), 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/QMFME2228678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49a02952bc9757f61af6238908017fed8c9b6c6dc05a761f3a5ef35b671ea33. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QM6MZ2306871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49a02952bc9757f61af6238908017fed8c9b6c6dc05a761f3a5ef35b671ea33. 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/QM6MZ2306871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265254e57b9294e72d1539a2c7fc99f6828b431598cde27638cbafe2839f35c2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:42:36Z), 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/QZWV32437404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b14782454e8fa61072ca93ee9b48d5a4b193610eee9989403b9efd4e783cae. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USLZJ2572298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d409dce1bf4613a60295d4edd80cf63de27d42fe4a0a8bd1b6a209feae6e39. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA62284409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d409dce1bf4613a60295d4edd80cf63de27d42fe4a0a8bd1b6a209feae6e39. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:52:34Z), 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/QMDA62284409.