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 0x3a04e2062e0dbc7d7e779646ea37f327a71195a63ecf560fb8a189b2289bad8a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa9feebe-e441-410d-b0af-a45ed9222caf.json and https://artists.proofprofile.net/proofs/artist/aa9feebe-e441-410d-b0af-a45ed9222caf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Relaxing Jazz For Quiet Moments: Relaxing Jazz Piano Music
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 0xb42d1dd6e0a923001e7b36fa62b8c6ddfe4ceffd7766395d2276dddaae12c7bf. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM80923796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6e3e7609a0f76668796d0fd3e1986b4c21ac5f1284d69d4ad3a1e645368bf9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM80923799.
Jazz Christmas: Collection of Christmas Jazz Piano - O, Christmas Tree, Jingle Bells, Carol of the Bells
O, Christmas Tree and Other Christmas Jazz Piano Favorites (Oh, Tannenbaum)
Classic Jazz: Best of Relaxing Jazz Piano Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598783dd10732988ed004b2e7ec11fb6bc62c9d71fdc40d93b56b8fefc472ff9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAAT1044901.
Ultimate Christmas Piano: Jazz Piano Music for Christmas