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 0x835c332f75788678f5ab9eaff17dd870e6cf8eb54933e7f1b93ce2fb5e8e75a6. 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/34905b91-7d06-430c-ad11-4033bdac1c5d.json and https://artists.proofprofile.net/proofs/artist/34905b91-7d06-430c-ad11-4033bdac1c5d.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 0xf6b0cfd5e032966eea5226c2b5cbc47ee294c919e48e62b84fd2ede7e7d67e94. 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/USGF19820509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5172737714c90d82945a0161d3f0719640d360f4adbc90ca7fdf56616cdc1b2f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:31Z), 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/USGF19820514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a39bd773ef42c4d0c274aeddef423cf4d1972737dc15a1ba56d651b2977bd5. 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/USGF19820524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203320e9a12416a57ca38cfe07fb0d99ab82527773256cbea4845ba20e346cc9. 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/USGF19820517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2b6d9c7a3b8d72a0988287fa7819893aad68d4ba2d0474ebedd578581c28a9. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USASN1301742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d51635b4e81d8ed83428de96147f92c84245a0324bb032530147acc58ce6a4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:25:40Z), 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/USASN1301749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74760daca959278a57bcf8dd7d71ccfc50944e16b459407166076a972698080c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ41941961.