Jonathan Crow is a prominent Canadian violinist. He has been the Toronto Symphony Orchestra's concertmaster beginning in 2011. From 2002 to 2006, he was concertmaster of the Orchestre symphonique de M
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 0x14c870eead966ecc0f127da8628ee4100eb5108e52b2cda6c069dd3781d13fae. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3261285-744e-493c-909b-d83d29c25bda.json and https://artists.proofprofile.net/proofs/artist/e3261285-744e-493c-909b-d83d29c25bda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Elgar, E. / Strauss, R. / Ravel. M.: Violin Sonatas
Sheherazade, Op. 35: I. The Sea and Sinbad's Ship
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 0x7ddf2d31d87d5b335d30655eaad71fbbed41a88db4eac06fed65f122e1744a52. 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/GBLWD1407701.
Sheherazade, Op. 35: II. The Kalender Prince
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf44d45bc58763e702194519d3526419f81b0a136a6131c1730897b1ba322de. 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/GBLWD1407702.
Sheherazade, Op. 35: IV. Festival at Baghdad – The Sea – The Shipwreck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d192beb8455595f3f4f770d8003d7633f48c7c89f89b3d54e2e7c3058688d0c. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBLWD1407704.
Quatuor pour la fin du temps, I/22: V. Louange à l'éternité de Jésus
Akoka: Reframing Messiaen's Quartet for the End of Time
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eba57cb66316cbcda0352d3d50d11f563b9fb2efdfabd6252f9a13e8603cc78. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLE421500806.
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
Quatuor pour la fin du temps, I/22: VIII. Louange à l'immortalité de Jésus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f1ef094453edfe8d5e514f3b84496d7c383e45f3f0ad608eb22b7e15327a47. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLE421500809.
Sheherazade, Op. 35: III. The Young Prince and the Young Princess
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4395edfacb4b7d190266fd3cc81b61b7e13b4f4ea72d0a1822c3f03feded024f. 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/GBLWD1407703.