The Philharmonia Virtuosi is a chamber orchestra that first performed in 1974.Oron, Aryeh. "Philharmonia Virtuosi of New York (Chamber Orchestra)" Short Biographies. 2005. 29 Oct. 2008 <http://www.bac
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 0x33273c0b6e6d43a7e41fa52649ae6dc89e0280de851b7a2701a09748d33f86f3. 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/22eed297-9bab-4a03-808b-f91454c2c0b6.json and https://artists.proofprofile.net/proofs/artist/22eed297-9bab-4a03-808b-f91454c2c0b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pietro Locatelli: L'Arte del Violino, Op. 3, Vol. 1: Concertos Nos. 1-3, Vol 2: Concertos Nos. 4-6
Jesu, Joy of Man's Desiring from Cantata No. 147, K.
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 0x4049869ba043148f196b77087e030cae7f798bdd3c8b7f0adb10e40ba89c8a02. 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/USSM17900496.
Pachelbel: Canon; Albinoni: Adagio; Bach: Jesu, Joy of Man's Desiring; more
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe471689cb78092d4d4240ebd83cf220a4c1bac4c2e6f193a3ab1684ffc835b34. 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/USSM19600487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe471689cb78092d4d4240ebd83cf220a4c1bac4c2e6f193a3ab1684ffc835b34. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USSM19600487.
Suite in D Major: IV. The Prince of Denmark's March "Trumpet Voluntary"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdea3bc81414ed958815e8e07c1561055ace7ce176f480048d4e636003f56b67. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USSM17900910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccd2f976b18c820cdc5f43b42638fe1b976ddb45a18fcd841721ce2a66a44ec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US42M0530459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffe60d62f53c3ce63f9831ada7d81db0ede7caeeee4de32bc37b3ceedd210e1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US42M0530460.
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