Peter Friis Johansson (born 1983) is a Swedish classical pianist who also holds citizenship of Denmark. He won first prize in the Alaska International Piano-e-Competition in 2014."Peter Friis Johansso
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 0x93e6c28442d85ef97e318eb678724743857c0df8919648970fc316fba2da0b45. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ab58604-29d4-48d8-b89c-9145823ba494.json and https://artists.proofprofile.net/proofs/artist/9ab58604-29d4-48d8-b89c-9145823ba494.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Netzel, Sandström & Tarrodi: Piano Concertos
Grieg: Lyric Pieces, Op. 54: No. 4, Notturno
Piano Quartet in D Minor, Op. 3: III. Allegro vivace
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 0x532c97e6d45c102c24db3399ad3a7607a9f8635039fc37de2c91a1813f45eeb6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SEAEC2586060.
Beyond Schubert, Vol. 1: Schubert vs. Andrée