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 0xceedb9e90b38783bd58fe7a935afb81358a0e62e15d107d69c8e4e333fb94452. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/293d77e0-6868-4d98-ac2c-04019a3c8bf8.json and https://artists.proofprofile.net/proofs/artist/293d77e0-6868-4d98-ac2c-04019a3c8bf8.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 0xa7d0a97406adbc3549a83225af6e81fbdf49031a0389c392274910db24b6437e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:18Z), 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/AUMEV2360730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3aaed35ad80bde9047ca14ac5533bcbebbca950782a06613aed48914760643. 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/AUGBT2313571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a278f1a266ab5e6c0c4427a28c9ef7deda37cc6492ea857910c0a7b61fa8ce. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:20:12Z), 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/AUMEV2403339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583e7b27b3ccd57b6a788dcf8076ee47d08c06663536d87434cd168b89ffe2b4. 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/AUMEV2406626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38279ba8b0650b98e47f5c141e137c10d5493077524b608d88d3dca98232a772. 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/AUMEV2455598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5f70e703195cf371a7ddaeb42101c36f3b7b096183ae9514e713a852d98bb3. 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/AUMEV2477598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac656266f0f54bc2dd3e4ced594834bc0a93d0143c26bceacce98e9c810a36ba. 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/AUGBT2401097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aafc3fa917bc8a158982716e34c3934a24d11e1a28fc649c5e0f38c1f4c510. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUGBT2407169.