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 0x948cc24d5da616fcae9c909abd89d73d15c3c508aa42f69f0bc24662e79cf0d4. 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/c01ff81e-21c5-44f3-b98d-be367a4a5f9b.json and https://artists.proofprofile.net/proofs/artist/c01ff81e-21c5-44f3-b98d-be367a4a5f9b.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 0xc326a03bed8ac69bf677f60433e1dc7ca7554b7385f3d3efb35b93478a4f08d2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:44Z), 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/NLP761800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19553e75d42088e9514c9865413dc34ef584981351c36afd646bec4a3a92b936. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:11:19Z), 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/NLP761900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55511f871745a59ea5d4073c026eb29a1144ceccb7589bce447154cb14cb946a. 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/NLP761900333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc295fe2bda6cf83973b3a01e924d27a87430c0b3c1a910c0880dc6d18705ca27. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:47Z), 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/NLP761900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3692ac9eb83996e31b47a9ffa5adad45d8608a33cd5e55b67530c42013013e. 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/NLP761900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc911b60ccb1b871f91889d69c0a7524869ffa40b08c84b955512306f0923dd8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLAM41900055.