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 0xab858f9bf28c230f703c803bf3185828cfdedd35df5b4dcfeab12430b4142a7c. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf9a157a-a484-4b2c-9ae7-bec07a72c687.json and https://artists.proofprofile.net/proofs/artist/bf9a157a-a484-4b2c-9ae7-bec07a72c687.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nonne Hall sjunger Jules Sylvain, vol. 1
Nonne Hall sjunger Jules Sylvain, vol. 2
Nonne Hall sjunger Jules Sylvain, vol. 3
Nonne Hall sjunger Jules Sylvain, vol. 4
Nonne Hall sjunger Jules Sylvain, vol. 5
Jultoner Fran Forr (Swedish Christmas Nostalgia) - Original Recordings From 1928 To 1954
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 0xcb50e1d5fbd41da7ca4038ba53064f7131f414b77264dcf87d20094733dc6bd6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKI190615209.