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 0x7097f9d072a727557d2414a889e2caa13533d2695c255a3d2dca5f38bbfeaeca. 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/c008e475-cc03-42ae-8612-08656185e597.json and https://artists.proofprofile.net/proofs/artist/c008e475-cc03-42ae-8612-08656185e597.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 0xfdf4869d52999c66412ba22f3e86ee88ac4a2c049d86fe19dfa4dd9aaf9aa83b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNWW2513922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6885a43839423f0088e48bea2db930d2f287f4d78adee5ac024ad23d5fc5116. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWW2513927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13700085f4436aedeefe36a715303ee0eeafdf2309a46aff69fa9358fd3e8047. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:21:33Z), 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/QZNWW2511525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cec199dfba5b43d8e40e5d8d609c908fb33d2211c008bb291c649fc0b3ff4f9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:45:05Z), 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/QZZ7N2558120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f293c9d9aca7ee528b364627b2348bb6aee95620ff7207b41d95b362931855. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ7N2558123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b01552396cc2656435b522f2767022bac89e75c41577f70dc3318568681b25c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:16:01Z), 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/QZZ7N2555437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0c293ba4e32e4a777cd12977a600ff446bcddc10048315df7fff12f66d5f8f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:16:25Z), 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/QZZ7P2510796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbd253d608ac3af669e89c6dc46c18c8247456e31fe2b4020c5372ba579e7dc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3EX2579581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9605b93d4cade712bda6f19014b1570775bcc19b0d8968c7ea038ff4b95d82d3. 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/QT3EX2575416.