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 0x044075c9029f2c1e946a054ddb7a970c9a2cbb4ae605f22231a738080f255ee6. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/783c5871-7c0d-4164-9d51-d8d4beaabf63.json and https://artists.proofprofile.net/proofs/artist/783c5871-7c0d-4164-9d51-d8d4beaabf63.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 0xf8faf6d923a835fe258a584f8e7c0349fab604575e4db7693ea964ef79c345e1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:41Z), 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/QZDA62177423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f333a583f3ce50e52e4c27868d5376c14fc89e963283debbfea2729cd1755a8. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:00:09Z), 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/QZDA72153207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002b62bdb27c1d6ecc0ccdebc81b5c8d039423a0619f8e152f42fd23a4e5429d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA82176958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4bf0a03557f89e215e05f88d865730962ab52b85543bc8a1dcae3d4b67fcf2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T03:00:32Z), 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/QZES62103846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafce8cc106584571db534675c54f46d924dc9b6d1cf8fbc669e8d323593bc2de. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:03:12Z), 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/QZES82110131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3cea25ead0bdf1230fe7bf3202c17604c2d48c4ebde4c7eb4ab0915678e80c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:26:00Z), 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/QZHN82121671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e247948468e8857fc352ec8bff58b7ad32d5847980b52e106efdcba96656204. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN92110017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e18d85c2bd5a770707eea70c2b8ebc63e11909afbb0668441e2bb3d1c1a791. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:54:34Z), 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/QZWFF2373213.