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 0x0bb93d43d7447ac665cb87f843edee21a31fee2b664bdc5849bb17a20a0e9766. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f74778f7-5c86-4f5b-899f-6d16d386949c.json and https://artists.proofprofile.net/proofs/artist/f74778f7-5c86-4f5b-899f-6d16d386949c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anthèmes II for Violin and Live Electronics: Lent – /I. Libre
Boulez: Sur Incises; Messagesquisse; Anthèmes 2
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 0x29df80d4917fa59bed48caec24909c1547121966a8e7911df35689a09951ddd0. 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/DEF059904951.
Concerto pour violon et orchestre: II. Aria - Hoquetus - Choral: Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf745285fdae6079f65548e23cd7e316b2e2fe64ecc11c7e44baaef97547a2660. 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/FR50X2399302.
Concerto pour violon et orchestre: V. Appassionato: Agitato molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac38f47ea337291912f683f0feefbffc7e987e6258e2e47d93f17480434e6a2. 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/FR50X2399305.
Anthèmes II for Violin and Live Electronics: I. Très lent, avec beaucoup de flexibilité – I/II. Libre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27de3423856bd7c2cbb68f5195537203a8aca7ddf047b6308782bc64a4f84cdf. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEF059904952.
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
Anthèmes II for Violin and Live Electronics: II. Rapide, dynamique, très rythmique, rigide – II/III. Libre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682dd1269d4283525cbd48d028d21ead696a1396b86c82ac01dcff455ec16930. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEF059904953.
Concerto pour violon et orchestre: I. Praeludium: Vivacissimo luminoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f31ea2d5c1a8a64601c09425bb5488634a9d88ae5450dfc6d20867a92f5f87. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FR50X2399301.
Concerto pour violon et orchestre: III. Intermezzo: Presto fluido
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693a06c3843d67df1dda3d19d70b17c23bdf822c4db7d0f980a3ebee19619d8d. 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/FR50X2399303.
Concerto pour violon et orchestre: IV. Passacaglia: Lento intenso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc995f41ab8c76b81d914038ab6c27899ad7c4ad5177af15ef8cdc90ed88c3a. 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/FR50X2399304.