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 0xe34a61422d0cf914cd89bf39af71c4f6c641541c186130956016f2310e9c999f. 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/78ebd659-bb0c-44de-af6f-4527446fa7b1.json and https://artists.proofprofile.net/proofs/artist/78ebd659-bb0c-44de-af6f-4527446fa7b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Muzyka romantyczna w Katedrze Oliwskiej. Romantic music in the Oliwa Cathedral
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 0x546620c4fc3bbb81ee0cb5c562a02f7b8f4c38b73761c537c36deffd99ec1124. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QMFME1468178.
Romantyczne Utwory Na Trąbkę Skrzypce i Organy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc531d9f6674c9711ed395a3dc6f354a5b5f06bf4145a5d23da03fa46092240d1. 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/PLI363198490.
Bach: Chorał"Wachet Auf, Ruft Uns Die Stimme"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f8db9541a8a1194a23f16ed324d8e5357baec1b18ed94cfabe0a4a3749dfdf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLI363198580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8413f9c147fae7ed670156b5b0dab83d9dc3925f8959c232bccf4ec07415c677. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/PLI363198610.
Selected Works for violin, soprano and organ
The famous organs from Frombork Cathedral
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b725b9641ad328ea3cdfc7fdd63990aed642ecbabb9a809d31ea2803099ced4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLA800608615.