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 0x13439c043bf36aff0a8be4f2eaf4095eb00c38d13b4076f2acfc3bf6c0395066. 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/0a5cb6ab-b337-430a-9e4b-497622dd9e72.json and https://artists.proofprofile.net/proofs/artist/0a5cb6ab-b337-430a-9e4b-497622dd9e72.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 0x711a9cf66e7b2a35b2eb74d37a7b2bbb02a0c06dc931db1be6a8598463fad99f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNC1919042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0247d6671d31346fb5161a19da5662db66c41fc349c2fca11b163cbfd0965e09. 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/QZDA52465271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9218f0c25a65b28c9152c49bb44266a16f664c638f1494bb1285bfda170698b5. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZDA52459714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ee1fa48a4d7d459daf284ebe863c1ede95befa8cb18cb726df1a99f5ba0071. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6P2497284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf902e36ca36dde1f768bcd5e291e4c5756d7f427e69dc7b6337d8e8602a42944. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3DF2516201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f24b3a4ab3cd3e136ccf365c3faca8a093958e2cda70a343a7d09a8b731ad3f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QM42K2581756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4958900b92ff5c109719ef7999fd6ed665340328b638b74ea99d06383a2cf1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:37:33Z), 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/US3DF2527398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6340f277322552b04530f95fc3aef5aec708f326116096bb15b628194d43968b. 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/FRX202578703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6615050e4eecf92d7f8f97f53a014a5432109f83c23f47049d9b00c5d23327. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:54Z), 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/FRX202578865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5fbf700f320b293b2a41f7f6df9e709e0236cfeb0985048631e68f43bc1742. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRX202578864.