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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ce0f9709df39f6445f22f4a887560be3567efcf80af9b88ba37e8c69e783f0. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e42c5e4-cfd3-4136-b18b-44c42538d2d8.json and https://artists.proofprofile.net/proofs/artist/7e42c5e4-cfd3-4136-b18b-44c42538d2d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Quatre pièces fugitives, Op. 15: No. 1, Larghetto
Clara, Robert, Johannes: Atmosphere and Mastery
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 0x3505c75a3fbf9297ec60d537acb644ab624c84e31ca6b35bb40b339de1b0f66f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CALC42200709.
Quatre pièces fugitives, Op. 15: No. 3, Andante espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c1bf797ab3f074f18a0921817526d937b1e3307e35c68be62894ddf57886b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CALC42200711.
Three Romances for Piano, Op. 11: No. 2, Andante - Allegro passionato
Clara, Robert, Johannes: Romance and Counterpoint
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8254c5e450859cb8fbd8701221b3ec31950f50c991463361ab9717643b7c5e75. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CALC42302409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ef5be730a6fc6899696c33c156228a64bba91668508d3978fc073ecf7ea6a6. 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/CALC42302411.
Prelude and Fugue in F-Sharp Minor: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00b657f2501e7276142c654391fc751be904744b4998c7e546eea934eca1e1c. 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/CALC42302508.
Prelude and Fugue in F-Sharp Minor: II. Fuga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fcaa2b0ee4fdc4f9438e243ac531e349cb25c7fd858475cfde04022a597cf9. 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/CALC42302509.
Three Preludes and Fugues, Op. 16: I. Praeludium I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18353f6b4a6a32a755215b7403f4355e5447066f8c3763e86773105ad0418d2. 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/CALC42302510.
Three Preludes and Fugues, Op. 16: III. Praeludium II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838045c30d430cf9e726715050a186e6912e720aead6c3de7442e8137bf88438. 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/CALC42302512.
Quatre pièces fugitives, Op. 15: No. 2, Un poco agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a11a783c6e7fdda0081ae98f43342b5652a8ea905ee958ab96d584eb03d564f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CALC42200710.
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
Piano Trio in G Minor, Op. 17: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b1294538614a1c07512267b88bf6493e48745c55815cbfa3f922ac7756ec6b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CALC42200805.
Piano Trio in G Minor, Op. 17: II. Scherzo - Tempo di Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfedc4320b3da7999dda768e3aa7439c59fbd5e930838f15b545123489ef547. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/CALC42200806.
Piano Trio in G Minor, Op. 17: III. Andante più animato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b315a54b935275f9fd7fb07e9c210f7dc59cdf7261483a039b1749f8c160ca9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CALC42200807.
Piano Trio in G Minor, Op. 17: IV. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dfaea398308082206596a94ddf8510680c711021e1754ae272a7c73aa4f2b4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CALC42200808.
Three Romances for Piano, Op. 11: No. 1, Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b8a735190c95104a4133c7fbc79c2c7380f7530257bf6926f1ff020330a47d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CALC42302408.
Three Romances for Piano, Op. 11: No. 3, Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b46b7584427d3d8e0c3434f94684a8dbd0efe6bab35566c7dc13f4795b74728. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CALC42302410.
Three Fugues on Themes of Sebastian Bach: Fuga a 4 voci No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb647b9d97fa4c04d87289525fbf7b83872f1c73dfe35ef0a9eca408882622646. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/CALC42302505.
Three Fugues on Themes of Sebastian Bach: Fuga a 4 voci No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ecb2279ee05a02f44969b00316ee7f319cd57a37f618a59077c4cca4773ee7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CALC42302506.
Three Fugues on Themes of Sebastian Bach: Fuga a 4 voci No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f84fc90888157130a933e32e3d64800c8393ef39a6694d413e97e97acc23ad2. 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/CALC42302507.
Three Preludes and Fugues, Op. 16: II. Fuga I. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a71dfb0e14642148a7f3eb898ae98a8c5065e5d13815c82933cceb22ec4f4a. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/CALC42302511.
Three Preludes and Fugues, Op. 16: IV. Fuga II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0202dab291dee911de4185680ab1aa1699afa6817b9b8e9784a6123c4e0c69. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CALC42302513.