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 0x7c712727ee8e30cbf9a18dae512cdb0725f805c158cb978e76894ccbfab4ff58. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac5c8e8d-a8eb-4b04-a332-af06d1ba1773.json and https://artists.proofprofile.net/proofs/artist/ac5c8e8d-a8eb-4b04-a332-af06d1ba1773.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 0xc6a673e7f7b897d858a6b71fc6dfe04fbd932b1572b33c9786f664483b5868b7. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZMER2127491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9d6a4c41f434d9cbb548f4fb0f52cc472ba8beac94b1dfa084e6bd71d20504. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZPLR2200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2334205bd45bec8c7768b0e1b24a8dacab1ca6a236247a437b658cdbb423f4d2. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZTB62315134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fe7219744f9af89e9b8282273462db147726c604c625b5c03cb554de29875d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZTB62315135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fcbd7dae6b74240a07c3cc07a21b65d49f3d717920233dec06a4ef3d9db3df. 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/QZTB62315136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1299ca90f9f5fa3c5a22fc727b30b54043d83b4a7ada19963fb8992987fde10. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTB62315137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d49d5f5b2d6b798674bb3945a899c48d581ff15ceecc56c938354a223dc598. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:44Z), 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/QZDA72410704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033d04d27281305dbf68e6914ce7b4c7e66bc9e3b1a872206faddcda7fcb3c7d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:43Z), 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/QZTAZ2558833.