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 0xa84c3747778350d477bb63e943929e39b33e43e3e151ff9b33af247f263e3e1f. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6764b623-fc61-4a57-b003-e28628a5f83a.json and https://artists.proofprofile.net/proofs/artist/6764b623-fc61-4a57-b003-e28628a5f83a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage Dance Orchestras No. 257 - EP: Hi - Lili, Hi - Lo
Richard Hayman; An American Conductor & Arranger, Volume 3
Richard Hayman; An American Conductor & Arranger, Volume 2
Richard Hayman; An American Conductor & Arranger, Volume 5
Richard Hayman; An American Conductor & Arranger, Volume 9
Richard Hayman; An American Conductor & Arranger, Volume 11
Richard Hayman; An American Conductor & Arranger, Volume 8
Richard Hayman; An American Conductor & Arranger, Volume 6
Richard Hayman; An American Conductor & Arranger, Volume 13
Richard Hayman; An American Conductor & Arranger, Volume 4
Richard Hayman; An American Conductor & Arranger, Volume 7
Richard Hayman; An American Conductor & Arranger, Volume 10
Richard Hayman; An American Conductor & Arranger, Volume 1
The Golden Age of Light Music: Springtime
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 0x8f0f6b88ddf4b4aeb8f2d43ae6120b412d7ad6cac4f970e2a5ee4702bd1c09f0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CH6631451604.