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 0x0a0223021e9368d609a8ec140616dc1e3ded008530c505b4fd47110c07f15af8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4442467c-56be-41dc-a087-4d116b0497d9.json and https://artists.proofprofile.net/proofs/artist/4442467c-56be-41dc-a087-4d116b0497d9.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 0x1b19dde910df2e3a7d76dae07b367b3c9e2977f2dcddf72eca9b27d20ed8fd1e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:41:53Z), 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/QZWFM2533284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc987671aca61671ef000f1c066679914c71b1e1d4ff2c676f2b63fd622132f41. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:43Z), 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/QZWFM2533272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bed547ecb277437892b01c60ac433ca803e2cf7375fd4211af39b05816d720. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:52Z), 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/QZWFM2530771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a17fe29cd23197a59eb9f4a696fabbbda511fe2ae4e978c61d3c9c84aedaf14. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:59:04Z), 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/QZWFM2530891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b793cb77f294d95e65895c45696f5fc951ac6a12a175d900eca4f8cc68375cc. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:07:38Z), 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/QZWFM2533275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f49704e076a982106420132085bd2fd8809812520a92f7de8b7e1dbe94cc68. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:55:02Z), 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/QZWFM2533285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97541fb4b5a2e0dc40ee2fce4d69c6be3fd8460a16d82a25db29214e84a42f77. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:51Z), 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/QZWFM2533280.