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 0xd627adf68b900f6874e228bf944b85e65e39874ffbdecde0d03d33cc8da7d52b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2f00e1e-6f3e-4889-9a68-5e9eb7030195.json and https://artists.proofprofile.net/proofs/artist/d2f00e1e-6f3e-4889-9a68-5e9eb7030195.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 0x205d2b76b6da3ca3acb5c1c766503c6c975f43f8a1deeb4e3c359a625df942c6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:58:21Z), 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/GB45A1400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f4ee677b40c3155fea876a32eb101413a1b93b5bcbca667eda44e3e3e5fecf. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GB45A1600308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af779f7cc57d957d57a0e233631b8934a63d18b3baadf0e70192ac99d6bee40. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GB45A1600484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6302088ba0f568b2cdd9d31aefef83a9a593bb87463eacf993d865f0f8ea7524. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:51:36Z), 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/GB45A1600485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadeaa1c81d72a4a07944c460da342c7edbe3ecc74b7af68dfbbd2e9dd5e1d3c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GB45A1600483.