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 0x87b66aa1df8e74f0defa882fa31213eee7e45135f464691bd71161cc1a5197e3. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4c8db64-b007-47a6-8b02-f7b32f3a2dd4.json and https://artists.proofprofile.net/proofs/artist/b4c8db64-b007-47a6-8b02-f7b32f3a2dd4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x3377822752c8b3f90a632018bd662040dc84fe8dc7bc0c43a65b84f7cf4ac1cc. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HUA182117201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db1a18adbe680db70cbd81f79cd75a46b9260de92972c66fb93af8f75b3407f. 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/HUA251687911.
Bridge over Troubled Water (Sung in Hungarian)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed740dec64494b92fece13cd9b12e0855a40504ffeeb060fdc400f198067cd6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HUA251687913.
Bridges of Souls (feat. Jimmy Haslip, Russell Ferrante)
Concerto (For Jazz Guitar & Chamber Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8700ff83f7b32af09d4d1921764b93be25f7e51d1b65c357e81159be5ade35de. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/HUC301300104.
Csanyi: Tukor / Sombrero / Es Akkor / Edenkert / Jegeso / Attila: Doctor Q / Tevedes
Hungarian Jazz History, Vol. 5: Szaba Deseo: Funky Violin
Szego: M. O. M. / Resonances / Incantations / Concerto Piece for Trumpet and Percussion / Waves
Oh, Little Town of Bethlehem (Christmas Songs)