1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x31079e3a4c79aed0a049b8d15adbc21cf6ba9fc205d3278522261053c2203b3f. 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/64ba0441-5a20-483b-b806-ee29bb4bdf8e.json and https://artists.proofprofile.net/proofs/artist/64ba0441-5a20-483b-b806-ee29bb4bdf8e.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 → block OTSBitcoinBlock must exist at that height 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 0x796144bd70f954cbb114322ef598ab7623a3b61e4b9b3e8c9824e0ec2af03904. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CZA162253353.
The Barber of Seville: Figaro's Cavatina „Largo al factotum della città"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e58f4238485daaef2af6763554c8292c3a509d790c4d8164b18e3c22a481a3e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CZA162253354.
Violin Partita No. 2 in D Minor, BWV 1004: V. Chaconne - Arr. for Accordion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc849ae03423d81fed51ba54bc49335c2192f929c34adad778814d1a520d17637. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CZN921900038.
Sonata No. 2: II. Adagio tranquillo molto
Sonata No. 2: III. Vivacissimo con spirito
Five Views on Gulag State: IV. Wood-cutting Area
Five Views on Gulag State: V. Criminal Authority and Creep
The Goldberg Variations, BWV 988: I. Aria
Das wohltemperierte Klavier II: No. 14, Prelude and Fugue in F-Sharp Minor, BWV 883
Das wohltemperierte Klavier I: No. 7, Prelude and Fugue in E-Flat Major, BWV 852
Pièces de clavecin avec une méthode: No. 18, Les cyclopes
The Four Seasons, Violin Concerto No. 4 in F Minor, RV 297, "Winter": I. Allegro non molto
12 Variations on Ah vous dirai-je maman in C Major, K. 265 - Arr. for Solo Accordion
Suite gothique, Op. 25: IV. Toccata - Arr. for Solo Accordion
Violin Concerto No. 2 in B Minor, Op. 7: III. Rondo "La campanella" - Arr. for Solo Accordion
24 Caprices for Solo Violin, Op. 1: No. 24 in A Minor, Tema con variazioni. Quasi presto - Arr. for Solo Accordion
Italian Polka in E-Flat Major - Arr. for Solo Accordion
21 Hungarian Dances, WoO 1: No. 5 in F-Sharp Minor, Allegro - Arr. for Solo Accordion
Scherzo tarantelle, Op. 16 - Arr. for Solo Accordion
Scherzo fantastique, Op. 25 "The Dance of the Goblins" - Arr. for Solo Accordion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296aaba5f1639344db90a72f3fbe1ca923019966de90c21b6a8dac071f94e8fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZN921600011.
The Four Seasons, Violin Concerto No. 2 in G Minor, RV 315: III. Allegro "Storm"