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 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 0xb434dd40ac9b8507d600bf16d1c8ced813688f6cbd701546185788d56407960c. 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/907c49bf-5580-4770-a66b-22f36d527350.json and https://artists.proofprofile.net/proofs/artist/907c49bf-5580-4770-a66b-22f36d527350.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for Oboe d'amore (2014): I. Andante
Christopher Tyler Nickel: Concertos for Oboe
Nickel: Symphony No. 2 (Excerpt): Misterioso
Christopher Tyler Nickel: Symphony No. 2
Sonatas and Chamber Music For Oboe and Oboe d’amore
Sonata for English horn and piano: I. Adagio
Nickel: Concerto for Four Wagner Tubas: II. Adagio
Nickel: Concerto for Piccolo - Concerto for Four Wagner Tubas
Suite for Oboe, English Horn, Bass Oboe, Heckelphone
Christopher Tyler Nickel: Mass: VII. Agnus Dei (Lento)
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 0x7e7db0ee537a49080b9485b4aae109fd9d8945e05c6df42d89392e2ca2b43ecb. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/GBELX2409181.
Christopher Tyler Nickel: Te Deum: II. Tu Rex gloriae (Andante)
Christopher Tyler Nickel: Mass & Te Deum
Nickel: Suite for Two Oboes and Two Cors Anglais: I. Kyrie
Nickel: Symphony for Flute Choir: Movement II
Nickel: Music for Woodwind Choirs (2025 Remaster)