The Irish Chamber Orchestra (ICO) is an Irish classical music ensemble, administratively based at the University of Limerick. János Fürst founded the ICO in 1963. The ICO consisted only of strings as
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 0x4bd48efbe7c25a352cba2f814e94bc8bb47d711eaa1c4c9d467a0b12357dc87a. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12f706b7-3844-4122-9e9d-d9f3c0f6a35f.json and https://artists.proofprofile.net/proofs/artist/12f706b7-3844-4122-9e9d-d9f3c0f6a35f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mendelssohn: Symphony No. 3 in A Minor "Scottish" & The Hebrides - Jörg Widmann: 180 Beats per Minute & Fantasie
Piazzolla, Schubert & Schnittke: Works for Violin & Chamber Orchestra
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 0xd60e6de28a37eadea6547a36dc3d4bd565d1e1eb731903c3a48594daa8542bab. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBLLH2064303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa61c24ffb25fec9d82d310c1e6b2a00ea706295874bd7e8259465b0da4fc6f3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLLH2064305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f294ab0a6806f6ad74ea30d3e833522f59bba22dbbd6272603cb733a6cf4005. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBLLH2064302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491d5e7a46ad12da898fa1119895adb702e9e36554f41d05ab760f9cdbca172d. 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/GBLLH2064306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2e57ae4ae3a95811b4d5ecfe9f3582f907b9bf443a6e06a16a25107ca23dc2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBLLH2064308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ae29a75a109555e2c36139d2c86e489032e54babe899c1d5f5298529935b2b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLLH2064309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efb909c0de7e2eabddd129398928e6a2012013ad90befd16de60dc67d24fa6f. 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/GBLLH2064310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c938ec7d07249cc76db05a4c1c0c1829dde9cdd353333351d8c86bddff64aa. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBLLH2064311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56580ed54caaefe2889b0f205c06ddd7148a6241da8430c571adceaed53df524. 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/GBLLH2064312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f9e21118eb6446294f9d7772a7fea36f89d223943e8a5ec7b7172702d14903. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBLLH2064313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa944e522e32130fb31a1f1b51ee3aa2e49203d050a3856e98df1d9fbe489f6a2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLLH2064314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb47c56a3c868f71c12cee70530a90de031eff12af130fe47d5814355bd0faa6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLLH2064304.
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 0x747ce89ff29bc02790ba4694b3252722188ad3712774149307437df3f131749d. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBLLH2064301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2d325d66cb1e56ac146d763216c207327153dcb676725fdfc7c16eb976556e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBLLH2064307.
Concertino in E-Flat Major, Op. 26: I. Adagio ma non troppo
Weber: Clarinet Quintet, Concertino for Clarinet, Grand Duo Concertant & Der Freischütz Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d4f826b06f730fd214b6b18c0f66d79b521ccd4ed2abe892c4b2947dd7f53e. 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/FR50X1963701.
Oboe Concerto in C Major, Hob. VIIg:C1: I. Allegro spiritoso - Arr. for Flugelhorn in D Major by Sergei Nakariakov
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fff6c39c18fac35f89b49d6ef76a79327e95a90bf311876f6c34b5dca0a407. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEBL62300062.
Oboe Concerto in C Major, Hob. VIIg:C1: III. Rondo. Allegretto - Arr. for Flugelhorn in D Major by Sergei Nakariakov
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4bc2cea82b90b0ce90a6364d45642df6310d0733b586644485c5fd5bfd997. 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/DEBL62300064.
Concertino in E-Flat Major, Op. 26: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cf6ee220dd8dfba1b38ad9a5a62656a6a6b58d613fd5223add403e1c6855bd. 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/FR50X1963702.
Clarinet Quintet in B-Flat Major, Op. 34: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d248a8b47a1133bf564e09769eca8cfb0162ff8cb257f6d08d28373191cf3d1. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR50X1963708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f01d49c681725a78db4c3de292e59e0da4b7d6e453153faba0d929d214f0b5e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR50X2076701.