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 0x0053dc423a40302b2ac8f17e90bde2b4266a77080abc6eabc8806117c3c508de. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84748448-55fb-4956-a32d-dd11c83a67a3.json and https://artists.proofprofile.net/proofs/artist/84748448-55fb-4956-a32d-dd11c83a67a3.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 0x0ca485bcba16cc3acb14388a9b67de680351e2eed3a090fa9f70acfa3e380e31. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIB2455826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36543d839063bb719ce350af8645e5adec8fb4c97509ccd95ab9f66e26e777a7. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:59:30Z), 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/TCAIB2455833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3532da80fcc863081c594f9acd03ac345fe259694f7c05895a5116b19cf97693. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAIB2455839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2857a2acc29b16ae4156883671d15cceecb45f5a569afe7e42c277fc350071de. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIB2455844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa642556d003cc409eab88a01e0f59780ee09782412a70df3d228278d6c116405. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:19:31Z), 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/TCAIB2455859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c4dd518a923b4ad42f9ec2b8e601f2681259f3328e03409dfb7c2e621ccb5e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:01Z), 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/TCAIB2455868.