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 0x6f26d5fc44b6f71c9c34fe4683c27eae64e76ba7dc0957e6567abad591c4ebcb. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a099c3a-6214-47f5-a9e8-6ada6eb65ca7.json and https://artists.proofprofile.net/proofs/artist/8a099c3a-6214-47f5-a9e8-6ada6eb65ca7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Harald Genzmer: Musik für Flöte, Klarinette und Klavier
Gaia Music Festival 2017: Music of Liszt, Beethoven, Ravel, Saint-Saëns & Schumann (Live)
Martinů: The Complete Music for Violin & Orchestra, Vol. 1
Concerto for Flute, Violin and Orchestra, H. 252: I. 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 0x85408dabf9933880245b5f80c2ddde72dda9cff7b51d482c3318d338e0722ec9. 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/GBAJY0767101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181bf666aeb33cf596be5aa5291fcafc0f753b5cea787c849de8d3082cdb40c6. 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/FRY220301694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd09f5c6d6ac9da39b20adea677c2f1c34c4b29d80633abb4cfb98b29108a6b5. 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/FRY220301696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e76ee01475de75e3f086fd5b66ef1e8c6318c97013703589d88605e29054b0d. 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/FRY220301697.
Sonate pour flûte et harpe in C Minor: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea161ccf97fd8d13739479e82a3d7a80e00e43acd0986023e094ab6a0cb004e6. 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/FRY220301704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd536d3e5a38bbf0c64d2807e047fa6deb01b07fb7406c51097fc9b47db359d6. 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/FRY220301695.
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
Concerto for Flute, Harp, and Orchestra in C Major, KV 299: I. Allegro - Arranged for Flute & Harp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08eec404fb7fdbf097bc17a27d293aaf9a88b48868ac008d14db07335297518. 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/FRY220301698.
Mozart: Flute Quartets (Quatuors pour flûte et cordes)
Honegger, Shostakovitch: Œuvres de musique de chambre