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 0xca8d89df60eaa1b338e7e083d8cbe208e63197acbd87ad1306c07c8c860986e2. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee4b39d3-42c1-4009-9c5d-88a139ab1eef.json and https://artists.proofprofile.net/proofs/artist/ee4b39d3-42c1-4009-9c5d-88a139ab1eef.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 0xa08d3fac1aa71fd363d9270086c19462dcbbf956191e2043c2bae726a202e21f. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:47:37Z), 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/US3DF2517533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132ebdd405776e8640e3910fafd206b26ae9e8081165fff34c3c5236c39ed07f. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/US3DF2517534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9825273ed29bfc87209f6200fd16fb564bfe0d3133239f2a8d7ea79f245075c9. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/US3DF2517535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5524b8d6ecaa30c28b34ba96b08f6846c6225b52b52702752bae90ab3dd1f30f. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/US3DF2517532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e59c4de2b8c104b64c2c2805e1d3c1ae213d94771d5c718777d406b82ce34c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/US3DF2532687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63435d2b9c7fdae7a0e2c5e03cbbf72c6f4aef651017e4093eec64ae8c2e3946. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:18Z), 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/US3DF2532688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9a63248d2d265968c4987cfabb1b277feb6b854a986494c57b40d1c40d869e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/US3DF2563320.