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 0xf23092ef4bcba152bea22877eb72446dfe17f6d9de19196448ebd27b4a8f0b65. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80cc0135-3cda-4bf4-95e2-b1254ccf6705.json and https://artists.proofprofile.net/proofs/artist/80cc0135-3cda-4bf4-95e2-b1254ccf6705.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 0x010ee8d91c5bbd1716c8920c44782af58e77d69fb5f2ebe975e438e6cf74b05a. 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/QZFZ72545040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bed4771f4a23063f9bb45b80df3751d2ea146cc11d09ed1906aee793ad3cac. 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/QZZ7X2464751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010ee8d91c5bbd1716c8920c44782af58e77d69fb5f2ebe975e438e6cf74b05a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ72545040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7465d074083600b879f1fe38c86407deb31ae44e2c223fde45b7285188c06f3f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:54:36Z), 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/QM4TX2572560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0399bd03725f2e2c743b12c27ba649d60bc349bc2226e600fdab9f53da378d2. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QM4TX2572562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10e36c483bdfdfa1f922709ebed46526a87fd2d8adbdad89f87b7517a4aa523. 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/QM4TX2572563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8959cdb0f2f7c1ac9cf78134760fa007c4d43442039fe5e950cb7326f5ecc0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM4TX2572564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787ec06d6416bbd978e2cddfc4801f476951e5973afd00cbf4a1f54ecdddca9b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:02Z), 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/QM4TX2572565.