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 0x0aa48c1fccbce4eb16768eab6cd653407a2d5b4355eebdd9eb522253d70d13fb. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86b7e5e4-e22f-4302-b13c-d4983a96f317.json and https://artists.proofprofile.net/proofs/artist/86b7e5e4-e22f-4302-b13c-d4983a96f317.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beethoven: Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": I. Allegro (Excerpt)
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 0x279fbb8d1017c3c2157d37aaf087f18fdf9c606716c5c7c8f69f69d7040dc23a. 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/FRZ116606432.
Piano Sonata No. 8 In C Minor, Op. 13: II. Adagio Cantabile
Down Time: Classical Music for Quiet Moments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975cb6381d4bdf37d96f3b75a3cecf72ea74ca88efeb31d3d12c90d21ee7321b. 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/USSJ10700127.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee81cef1a006e7fa75cbe23713f2d0ed93d4b243629c5776093f9832079d6469. 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/USSJ10700243.
Piano Sonata No. 8 in C minor, op. 13 "Pathetique": II. Adagio cantabile
More of the Most Relaxing Classical Music in the Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66336704f5eb0e34377ce4b2e6736720d824155ef766094066a077b9a165d519. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USSJ17000748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428e5e517a9616ebde4d8931ede1a911fefcb5f1cca64fd58cb644dd3ad722b4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USSJ10700262.
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
The Best of the Most Relaxing Classical Music In the Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133d508c0cd878d08e0516e5dd7291a282bfe2e1d597ea16e9ca48d3e0b66917. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USSJ10400983.
Piano Sonata No. 14 in C-sharp Minor, Op. 27: II. "Moonlight Sonata"
The Ultimate Most Relaxing Classical Music In the Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c5d9cc1bef1610623a1a85414ff0b78df7964e698c92945bb67ecc3d9ab072. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USSJ10600389.