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 0x9b5180006fccaf4bf0667ec1d3948a90807e4f941f18920ca10b71c84f865745. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac9840cb-3c8b-4add-8ecb-e55249a10086.json and https://artists.proofprofile.net/proofs/artist/ac9840cb-3c8b-4add-8ecb-e55249a10086.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 0x31a6174a2956848257a31fa2c743286f13a279409f34edd97ea43c09a7e519a6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPAL07900230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5335e7cb7dc9aea091d9a5a1ab71e4daaa31fdf2753dbaebe96224050177749a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPAL07900270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3763db23968523941df3490326bab401db4073f06e82553d3658e81720296613. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:58:38Z), 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/JPAL07900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbae9ec55a4a3fb2c0a01a22ad59fd06cbd34d4552f1fc284e0653d36540dd9a. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/JPAL07900240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b637ae8c3e632f355fe36e7c0cedba2eef44423a03188e7b9b0ee518e2ae1d1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:40Z), 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/JPAL07900250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884c2d22585f215e28acc77ed51013db5181295eb068fa58ac35c6416ecf63e1. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:01:17Z), 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/JPAL07900260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa024a36167d21011a8172e877cd25019fe51091a6757a6249475ecdc6fa8d98b. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:45:50Z), 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/JPAL07900170.