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 0xfa795c20aacbd7e93c207a99c9f57627936fdeffdb7e106d550271c73c85b93c. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7d21d7a-c466-4ff4-a8a9-6a4ad3621700.json and https://artists.proofprofile.net/proofs/artist/a7d21d7a-c466-4ff4-a8a9-6a4ad3621700.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nocturne in C-Sharp Minor, Op. Posth., KK IVa, No. 16, B. 49 - with Ocean Sounds
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 0xda31d0ea7babb780698d226e99eed98beb35c19d1dd86575a0b9f8daf7cde06b. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/ITK262400896.
Jazz Suite No. 2, 6. Waltz II - with Ocean Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652c8addc9e3d1887c353dd4a8498c2106885d7089331c8cacc4d00da9b0c5d7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITK262400897.
Classical Harp Serenity: Famous Classical Pieces and Soothing Masterpieces
Golden Harp Classics: Iconic Love & Cinema Themes, Unforgettable Melodies
Ocean Harp Reverie: Classical Gems and Gentle Sea Sounds
Harp by the Sea: Iconic Love Themes and Ocean Sounds