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 0x29470f2f7314c93095e38cf2416c572b25b4f30f71eee678f111eee5ee733f3e. 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/c9603e21-1d0a-4aee-811c-44d53399ea16.json and https://artists.proofprofile.net/proofs/artist/c9603e21-1d0a-4aee-811c-44d53399ea16.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orchestral Suite No. 3 in D Major, BWV 1068: II. Air
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 0x2e990fd363f8febff4898ade1ece49eff7d258e8d1b5f1547022f4085e425b67. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRZ130700580.
Suite in D Minor, HWV 437: III. Saraband
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711ca493eb12c30e682ec9c97895ee13a62b9651cd692e9385ae631634070435. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ130700540.
Canon and Gigue in D Major, P. 37: I. Canon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f98b128f8ddb778d56b8570b884a68ab37bb4e97f4caa893f716ba1a870ce40. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZ130700550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f0878a759a1a5a290906713cc0b66e2de5714392a2c46f389b0449023325e5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ130700630.
6 Flute Concertos, Op. 10, No. 2 in G Minor, RV 439 "La Notte": VI. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6d4125524182441ccdcc34f1e2181c5dc3e09d30feea2ce1567054f1cbb38d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ130700560.
12 Concerti Grossi, Op. 6, No. 8 in G Minor "Fatto per la notte di Natale": V. Allegro & VI. Largo. Pastorale ad libitum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26ded7448e52cfe5d69e2cb2574c6123685d1a440952d8d95c2077d05b53a57. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ130700570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e990fd363f8febff4898ade1ece49eff7d258e8d1b5f1547022f4085e425b67. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ130700580.
6 Concerts transcrits en sextuor, Sixième concert: I. La poule
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3a028a139865fc795b40ada431cb5505d85c4b96d02278847a9ed76868956e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ130700590.
Divertimento in D Major, K. 334: V. Var. V
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeea8e48eba9cdbffa0eef908970ce822c1b0689d1ce09b5992a9afca3047245. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRZ130700600.
Romance No. 2 in F Major for Violin and Orchestra, Op. 50
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12521d58f59d5eef3abb9297bbb342b6928691edd96ed72057e22cb5152d4eb4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRZ130700610.
Symphony No. 45 in F-Sharp Minor, Hob. I:45: IV. Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc0ef0bbc7e0c6afba581ec5479c2ba62a259afe306d520116b649fb704f448. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ130700620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb590613f970d46d9cfb1f803f784437c8a7abe931b24bcc76f3bae7f3401b35b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR47Q0901910.
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