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 0x341728d54c2bc6781dd1c4326027f9e5a74ed1f33f5c6a38521fb1afaa86a7fc. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/615054c7-6b6a-46ec-86c0-6c959e93ca81.json and https://artists.proofprofile.net/proofs/artist/615054c7-6b6a-46ec-86c0-6c959e93ca81.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 0xf993ad406e085406d3b5267f98208fcd0cfe41d173af75d462345698b1007dfb. 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/QZNMZ2231515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3382ed3e551126ad6144ec39e9df3aa1be4ae9c94bb4ae636e49b685e8072b67. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMWW2386320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4417ce6a1a08a734b7e4aebf0f3d59bcab24679a0f234c760a2b2fde954e38. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:13Z), 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/QZNMY2465920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f72cf3218b5a2aeb79afc64f5028633674893656a9aec51476d4f12fda78965. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:58:18Z), 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/QZNMY2465921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6985e0ee083a72693ad98c734b620f65e102c518df695dbbe159e9b99d61b1f1. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZNMY2465922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95de219ae4400e3de1b1175e7e40549b76979d2b9153170805c1ef6540d361c5. 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/QZNMY2465923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218d32de197164c7f2c53ae26c7ca7ec3f255348c70d0279e9a173ebf78ccf7d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:19:02Z), 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/QZNMY2465924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d40da0b8a6b4d132c69c62abefb6f9fecabc4de7bb380465cba30e11aa5205a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZL382594724.