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 0x0eefea6996a670a5358365045560caa5a4db443c8969a1f174f2085b0f1a577d. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e474b5d4-b4e1-4215-b880-b5322045dd28.json and https://artists.proofprofile.net/proofs/artist/e474b5d4-b4e1-4215-b880-b5322045dd28.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 0xecf000188b13da6887f1674d86fcd715bacbb7c19f24f26e15d209d08e75f391. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GXF9Q2437202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535659137de9d1d9dd17a74517ce2b6c0f8f1d4fc9b2832d01af5c676e81f66c. 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/GXF9Q2454779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9649e57a8833fad80027d1fdc154307410ee2f84ba4d0f63872742d9a3fdac25. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:30:17Z), 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/GXF9Q2454733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ee88f02e146cdfe88f2831c359277569099e4dbd38f6745f426f4304e8b694. 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/GXF9Q2479692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de63a79c26d42aa4e83bcf360943a5607d65d4d0258d10bba4566fd90a8385d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:57:50Z), 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/QZZ772457405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f46850871d1320ba3fb4a2f36711b1e1ceeec72909eb8fc24fd991b2c8e9e2. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:07:00Z), 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/GXF9Q2502413.