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 0x8fbe458dc10bb4b1dd48bf1941a5422e5952024e4ed3d6cec2271b460266c809. 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/26a54146-c3e2-480e-86bc-4613d9fd0810.json and https://artists.proofprofile.net/proofs/artist/26a54146-c3e2-480e-86bc-4613d9fd0810.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 0x717b3ab14fb7bb6e0db492756bd02a5c73ce5951ccbf6401883bbb6a2cade038. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:38Z), 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/QZWFK2375857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526fde07546d7563fa97401c9be5730cac265ed16662bfe3e630dde792d7ed0d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:27:44Z), 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/QZWFK2375858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b06f9307866a89a27bdb49c893253381128a376c5c7d312c9cf856b7543826. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFK2375859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd56b3752749c970667802166f8924a7790d93b6f1432026111586cfe703292. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:04:46Z), 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/QZWFK2375862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fc372db8083d598f3d51036af7ac68f6894255c54e5cf901b242b21a19642d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWR2389827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c5745dbc85457149ddb88167c6fc68dafae855a090cc70f7646971a22aa4f6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWR2389826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3b82357194bfb9350e1dae5d268491a6da803ad5d416ef1bfb8a6b0cc7f03b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZNWR2389829.