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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118609866af74620f0552318cc9111f27aa72625d9157044ac0c1084ad408e78. 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/e470c5c7-1c32-4845-baa6-e91330babb2e.json and https://artists.proofprofile.net/proofs/artist/e470c5c7-1c32-4845-baa6-e91330babb2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Airplane Interior Cabin Ambience (Inside Aircraft Airliner Background Ambient Noise Sfx Sound Effect Bite Clip Fx)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7993899cb0a75cfa4534672f1b7705712a1e047d1d6aa525e28ddc0db4948f6b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCABR1389849.
Car Driving Interior Ambience (Drive Ride Riding Inside Background Ambient Noise Sfx Sound Effect Bite Clip Fx)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6468a6815879db87f4b8311f2ed0117c1409547204d54e4dc2311ba8a14538. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/TCABR1389861.
People Talking Party Reception (Version 1) [Crowd Background Ambience Ambient Noise Sfx Sound Effect Bite Clip Fx]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19a2abbc5881cae439d68915500c9988f3769abc5cd8e46444b0e6892021993. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCABR1389916.
Trash Truck (Garbage Dustbin Lorry Bin Wagon Noise Sfx Sound Effect Bite Clip Fx)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a751759971f28876a4ecb65997a8f792b311618eb8effbf058b3df4a60b5439. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCABR1389938.