Stewart Goodyear (born February 1978) is a Canadian concert pianist and composer. He is best known for performing all 32 Beethoven sonatas in a single day, a feat he has done at Koerner Hall (Toronto)
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 0xea6725f87bf8ecea5ea0462e988052ef69f2ef146240028ecb2d86c4310ccc2e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bca2da2b-40d4-4f32-994a-cfc8434c0a49.json and https://artists.proofprofile.net/proofs/artist/bca2da2b-40d4-4f32-994a-cfc8434c0a49.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Almanach 1999 (Edition Ruhr Piano Festival Vol. 1-8)
Stewart Goodyear: Callaloo & Piano Sonata - Gershwin: Rhapsody in Blue
Mendelssohn, Goodyear & Schumann: Piano Concerti
Piano Concerto in A Minor, Op. 54: I. Allegro affettuoso
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 0x5028d9c77a0629a974d215724b85c554259c6a4dfae8dc6a0d2d5fd7ded378f2. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/GBYDS2500100.
Piano Concerto in A Minor, Op. 54: II. Intermezzo. Andantino grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bffab240aa2664b7242266d043bb04dfbe47424e15084ca0c01526ae614f9db. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBYDS2500101.
Piano Concerto in A Minor, Op. 54: III. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870c07f25e97c0162431010474a998795472da2ba88256d0a570a037a267e065. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBYDS2500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee3fc3b8ac0500fdfd841d15d2f21e3620b542a34abf8f4b8c97ecb5698e8e. 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/GBYDS2500103.
Piano Concerto No. 1 in G Minor, Op. 25, MWV O 7: I. Molto allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c83668faa06a1e8e27e96c2eeadfb132a34dc975af6d93d1311b4f2a9b4daa9. 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/GBYDS2500104.
Piano Concerto No. 1 in G Minor, Op. 25, MWV O 7: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e61dc4e110e038f0580b8ca484e0e8b4a008e3257eb97dc6b0367a36861a9d6. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBYDS2500105.
Piano Concerto No. 1 in G Minor, Op. 25, MWV O 7: III. Presto - Molto allegro e vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94f820420c7fcededf828d2b9695170a1d8754a00719b50a9d777e5951bcf2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBYDS2500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e10d1590d0b0e38ba58721285483488b0dfb9d008ca587a946670921840a12. 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/GBYDS2500107.
Piano Quintet in G Minor, Op. 1: I. Allegro con moto
Uncovered, Vol. 1: Samuel Coleridge-Taylor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b410082e76782107dcbd44d8e282da7c1df75b4f9a3a762fb44dd682f0e3952. 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/USSF61800231.