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 0x65c2fabceda41fd1395593c2b5c10f398265b21c0af91accb5d1ac2ec4dd58a8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edd5e351-4f6e-4ab9-af69-e7114e95e1e3.json and https://artists.proofprofile.net/proofs/artist/edd5e351-4f6e-4ab9-af69-e7114e95e1e3.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 0xe9269d381371c1b52b6b64f1bf69f50b38af239c74fb2b889ca7975b6f660fce. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMEQ2146514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155325af9403991a115328ccd1510cc6babb4d2623043ae9278bbd9a71f677cd. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZHNC2211362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e25965e458a8e171cf2433ee047ba88fb3ba9b160467c311f553978c94b15. 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/QZTB82296981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e25965e458a8e171cf2433ee047ba88fb3ba9b160467c311f553978c94b15. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB82296981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf1b7da9135a337337406ab1c5d827244fa662ec01899de2e2991b8e7ebe05c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWR2319888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf1b7da9135a337337406ab1c5d827244fa662ec01899de2e2991b8e7ebe05c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWR2319888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d5839242fbb8b76be6ceb426129d22edb473e0afeeae19f77f279e793d3e23. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTBB2404119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaf298ab40bd0f0ba84dd52fa8ca8e84c4e2d949a7649e3d9c12015a96d2c79. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:37:50Z), 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/QT4K32530619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932ca59263bc3d044af235ca542693a1a7f32c03709b4794ea8cb48d8b1eed44. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QT4K32530624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8002e0ad89ac076895a78da8c3747f678061e5697a56cb712cd074a412d87ee5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2542148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6154655a5f96c23286cb8dec006bb2e1015e96c4663c05c660b2e3e348ab78e0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:32:19Z), 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/QT4K32530622.