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 0xa6502155595612e6312dcc49d995b4400a3c59445e9e16ecd78512e7ab05abcd. 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/6f813267-b8fd-48fe-8707-58f1f22e60b3.json and https://artists.proofprofile.net/proofs/artist/6f813267-b8fd-48fe-8707-58f1f22e60b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alexander Tcherepnin: Piano concertos 2,3 & 6
Alexander Tcherepnin: Piano concertos 1, 4 & 5
Russian Piano Music Series, Vol. 1 - Shostakovich and Comrades
McLachlan, Murray: The Scottish Romantics
Innovations: Music for 2 Pianos & Percussion
An Album for my Friends: No. 6, Brian's Bourrée
Edward Gregson: Complete Music for Solo Piano
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 0x2b635bda4ab81c2aae16a8e40b7245d5a9eb6be1cb19e5d8b804548cb7dc1278. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKI192020006.
4 Pictures for Piano Duet: No. 2, Quite Slow and Thoughtful
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ec298fcbde38428d22200a00ac42c7ef8da5ebb942ef1821321bcc77651ff1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI192020018.