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 0x6d0a3f84b4668fa5c5ab80c58cfe86c8aad81b571ebef1f4a9d9bda79559d0c8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58df83fa-0f3a-4f84-a081-6e457444698e.json and https://artists.proofprofile.net/proofs/artist/58df83fa-0f3a-4f84-a081-6e457444698e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A'cappella, America's Favorite Hymns, Vol. 1
A'cappella, America's Favorite Hymns, Vol 2
A'cappella, America's Favorite Hymns, Vol 3
A'cappella, America's Favorite Hymns, Vol 4
A'cappella, America's Favorite Hymns Vol 5
A'cappella, America's Favorite Hymns Vol 6
A'cappella, America's Favorite Hymns, Vol 7
A'cappella, America's Favorite Hymns Vol 8
A'cappella, America's Favorite Hymns, Vol 9
A'cappella, America's Favorite Hymns, Vol. 10
A'cappella, America's Favorite Hymns, Vol. 11
A'cappella, America's Favorite Hymns, Vol. 12
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 0xd58991e3ba28985f0ac1fe266bf522ae5a8677e05d3c864e83cd1c13476e1c89. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM6MZ1937751.
40 Must Have of America's Historic Hymns, Pt. One
History of American Music: Hymns & Stories
I Can't Stop Loving You (Accompaniment Track)