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 0x6faae686efdbd68028444af50383cd831c3cada5a437d5b4b16073f58efb58d9. 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/44872268-1e0e-44e9-aaff-2c10f45f1cec.json and https://artists.proofprofile.net/proofs/artist/44872268-1e0e-44e9-aaff-2c10f45f1cec.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 0xb7869d1cb982abea058e46a54aaa38f636185db4846a34ae1cbe01afb0b4c5e0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:48:41Z), 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/TCAIA2485606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5587f84a92f623ad07e00aa638613633dd12fe0608a2521c3cd3c6bd383512cb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIE2482361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae791ba0beafeef227b344015e9f67afae1c032d5d6fc13d98a685d8184d1bc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAIN2444395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0786554ff2df285c7a0b5bdb083275ad17cd0eb6a7b3e1acc1daf698eb9b3c7d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAIU2452280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb23dc5711e70e51cc4ec48b322f67b530dcecf44536e2cbce27aee69aa0f263. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIU2452040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef4806e93540b6b1d1a5277131cad3675cc9072cddc83eaeb894989a7d90a9a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAIU2452100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d604dd9f2265c1c0bbb34c6031659cb3a64106f35aab8960de4f25f8606c9a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:56:52Z), 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/TCAJH2592473.