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 0xb766f33c93f247f450473519b051a7a948a6274cc248d5bc2605644cf3344c91. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1430512-41f0-4a25-9e53-a8dae2d9eeb0.json and https://artists.proofprofile.net/proofs/artist/d1430512-41f0-4a25-9e53-a8dae2d9eeb0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schumann/Brahms: Works For Clarinet And Piano
Brahms/Prokofiev/Schubert: Works For Clarinet And 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 0x1f67657b04f3983f1601ea5b4a0961cbc560e2c929d1d730b65b0a3d8a1cd930. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/CH0011300073.
Clarinet Concerto in A Major, K. 622: II. Adagio
Ich mag keine Klassik, aber das gefällt mir! - Für Kinder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8386615d7edd819c974b7216426848550138d898dd31ecda354eec84cfdb4fca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH0010900261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8386615d7edd819c974b7216426848550138d898dd31ecda354eec84cfdb4fca. 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/CH0010900261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8386615d7edd819c974b7216426848550138d898dd31ecda354eec84cfdb4fca. 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/CH0010900261.
Ständchen, D. 957, No. 4 (Arr. for Clarinet and Chamber Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa747d8196e56deb9b548e974bfd3d887468a20615c346bf3c4b205fbdbe5f94a. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CH0011300056.
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 0xa5d94c7bfa587b04fcf5322354f18e2755896a6e37b13d48151935e5555d5c7c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH0011300063.
Concerto for Clarinet and Orchestra No. 1 in F Minor, Op. 73: I. Allegro
Russische Kammerphilharmonie St. Petersburg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126f42a4c3574fa114f6e94a664784fa754d6018f2d9977982cf0ad2e0ade985. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH0010800274.
Concerto for Clarinet and Orchestra No. 2 in E-Flat Major, Op. 74: II. Romanza. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8867669c3d6abc08e8c44aaf8cdff2a73a5e19b8df7839ea859afadb7a363c0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CH0010800279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5243228f758e3b0d66302b65a6c779afddafe8902ab09eaec7da5ce5975ab9. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CH0011300069.
Mondnacht, Op. 39, No. 5 (Arr. for Clarinet and Chamber Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a27fce4ee10e31439ccd322d58b3aae5372445fcde29de53f04f6d7fcebf29d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CH0011300074.