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 0xf9e17df8beee7a979634d9bcd3a422ca9955aaa5bcb7f0b67c55f22476935780. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f262c65c-b345-4c34-9c86-32df94bab6a6.json and https://artists.proofprofile.net/proofs/artist/f262c65c-b345-4c34-9c86-32df94bab6a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Voyage Nostalgique: Bizet: Carmen, Habanera "L'amour est un oiseau rebelle" - Fauré: Dolly Suite, Op. 56 - Offenbach: Can Can - Grieg: Anitra's Dance - Adler: Hernandos Hideaway - Mancini: Moon River - Londonderry Air
21 Hungarian Dances, WoO 1: Hungarian Dance No. 2 in D Minor
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 0xa78ebebb2bed6708efe436063098fd32142fd51d23628541eefe03b960ecbf8a. 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/CH1400110001.
Rossini, Bach, Schumann, Piazzolla, Saint-Saëns, Brahms, Puccini, Fauré, Jarre, Pachelbel, Prokovief, Arlen, Bragato & Monti: Libertà
Somewhere Over The Rainbow for Violin, Cello & Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f3409794df6b2710ae32e1304ac5d67c85708e6f3045f4ea00e61a05ece23b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH1400518813.
Khachaturian, Mozart, Piazzolla, Haydn, Ravel, Bernstein, Loewe, Morricone, Fauré, Theodorakis, Brahms, Bach, Schubert, Nilsson, Lloyd-Weber: Simetra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e280d880a5e3b8474712f5b8d8204b288221a0126443d997b35d2a164cbd4d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH1400930112.
Dvořák: Piano Trio No. 4, Op. 90, B. 166 "Dumky-Trio" & Felder: The Second Attention