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 0x52ddf86e2d1518e6a7b5bdcc5debff9d7c032deb293c0dff562422bc5bec13a4. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0f5725d-dd1d-4538-a8e1-3b93bdf53a59.json and https://artists.proofprofile.net/proofs/artist/f0f5725d-dd1d-4538-a8e1-3b93bdf53a59.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Campfire and Evening Crickets (90 Minutes)
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 0x5d32d63bd35fab02796fd3c518b4209f0b5338de7a9ca413f55866bb5c0668bf. 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/QMFMG1353910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7484abd11d7d5ddc8be6f0b7ce81f3b11f04d4502a84a5216e500311b722b96. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QMFMG1353913.
Waterfall, Bird Song and Crickets (90 Minutes)
Small Stream, Bird Song and Crickets (90 Minutes)
Campfire, Bird Song and Crickets (90 Minutes)
Strong Thunder and Light Rain (90 Minutes)
Ocean Waves, Campfire and Crickets (90 Minutes)