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 0x2c2a6b9cb52c79acc869f736f56bef15e8f4e6e299b1d50629ec2b51cec312bd. 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/d6fd37c8-e497-4069-a1a1-8d64dff2f525.json and https://artists.proofprofile.net/proofs/artist/d6fd37c8-e497-4069-a1a1-8d64dff2f525.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 0x7470c0e3458cd69380a21c8ddcbdf91c7efb56c89b31e840d6be982b8e276d5e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:46:36Z), 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/QM7282547917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b13eee75e792cbd6220bbaffae9c4c0ceab275613f975aef8f5e6c17e0ae26. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FRX452259387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13528ee9340a8449223b707f04da041583e289740de26d047e81002b56233339. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX452255746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205e24de77c65e834f18f9a1456fd0644a75f1f0dd936f5f27d11d6e2aedb052. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX452255724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e650c56e341a4def9ee11644665f4f7509c08235766572a08674f22e5c2691. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRX452255750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e865949d3f2a72077c96693c150f52e462568b3f89eee3df431bbf3540fe8e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FRX452255752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b13eee75e792cbd6220bbaffae9c4c0ceab275613f975aef8f5e6c17e0ae26. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:46:04Z), 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/FRX452259387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cc5e60d4ae1fbd1b8cbf266fcfc6945ca8013eb8e8bdd16d5d92dfbb6cfe3d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:48:58Z), 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/FRX452255466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d043c7b0b59e9e36053fdb4ae62a06204cd6b763b471a11ba94e1e55d40a65f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM7282557151.