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 0x5793ea245d5815a38ad72c9b37a2f77e16eaed29a9f9f871f995a8ca386474d0. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb1e059c-b0ee-4a6d-a696-b0db08415b72.json and https://artists.proofprofile.net/proofs/artist/cb1e059c-b0ee-4a6d-a696-b0db08415b72.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bruch: Violin Concerto No. 1 - Stenhammar: Violin Sonata
Violin Concerto No. 1 in G Minor, Op. 26: I. Vorspiel (Allegro moderato)
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 0xa9e5f9968339c3920aa7dafd417d01c7b3210877aaa4c6b18e30d0f765b81aae. 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/UKGFN1800346.
Violin Concerto No. 1 in G Minor, Op. 26: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f8c27aedfd4929f1e07846db66c9e00c3d78ef54c799076020440d689c4600. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKGFN1800347.
Violin Sonata in A Minor, Op. 19: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c7896ee83e77ddade6c3245f20c5c227d3ce89c720900a09c99fa3d06b7691. 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/UKGFN1800350.
Violin Concerto No. 1 in G Minor, Op. 26: III. Finale (Allegro energico – Stringendo poco a poco – Presto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a87a054ae76c9b28644b3d85f86788206dd19c8fdfccd721633508e6384a4a. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/UKGFN1800348.
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
2 Sentimentala Romanser, Op. 28: No. 1 in F Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db307cc52860aa71671ce0ec878b47d034a9f84215f8a7cfa78307f0ce973b4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/UKGFN1800352.
Consolation: Forgotten Treasures of the Ukranian Soul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3fecf078cbe343cda9ad93887a087d3e272e93cc69b02408b35105545605dd. 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/SEAEX1622070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c5379d4c8211ea73068054be5623a68463be1223f95d838e9d4bc55301321. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SEAEX1622150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e47c49a9156ad2aea258fd4adcbb819d523c249d4356a5f8ff129100a2fb1f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SEAEX1622110.