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 0x507b5ef4975974c8a92fbdffe2ce79a937269a532b661b4c75a5faccd3e7875b. 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/e1ddb8a9-ebed-4ff5-89ef-8914da0316f9.json and https://artists.proofprofile.net/proofs/artist/e1ddb8a9-ebed-4ff5-89ef-8914da0316f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ultimate Piano Bar Cocktail Lounge (A Must Have Instrumental Chillout Collection for Dinner, Wedding, Wine Tasting and Love Making)
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 0x1cb14a8547e52431bd002b200458ef04afcfb667135d2e8eedaad68677e5d468. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEBL60575136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa895f061a16901b9dd0f6a6ca145603cf73f2aef2ecbcaec994f873c3c4d699f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEBL60575143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e7db9b50bd7defa88b39aa5b11d4f1b57c0c590a391c36b5da9c1bae207a84. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:28:11Z), 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/DEBL60575151.