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 0x45674b1a0e8ddb22bfa8bad3b63b82de132351ac6a259c20750743c82ef8d8f7. 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/5f27a8bb-8f6a-4ba2-9f19-7f72faef0755.json and https://artists.proofprofile.net/proofs/artist/5f27a8bb-8f6a-4ba2-9f19-7f72faef0755.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 0x6b8d6fe2057b6b76ae64b7ee88c5a0f30ae288f8305d09f6bf15a52ceb3eaef8. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZNWT2283418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57167f5904ff218007aa0ce8447eab287ca7b3adb30ffbf214c4a3f654d14b86. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:22:00Z), 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/QZFYZ2387707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7148cec7308f86bf83e3e530e38595aa700b70acad4644486ecc61c67669aaf9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTPX2454262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26433544adf71f715cd0f4f953de828f5d595c87288044dde564d58d5807ffa1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/US7VG2561703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55416568a7f3b247abf8ba45509d5bb78f1d575b6b057ef0c34b25c03dfb61a. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:57Z), 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/QZNJV2503635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373ebdc2143b75e3875b824553f2d8d79a9d1a6bb193e27977e2d11a23353250. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNJX2544506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa546171b23ba1d8687e0047c75caecde011896eb64f343727816135c53e76d2b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS7J2593596.