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 0x5cc245018b186018e6dcab95f40b61363e74a4e7c01ae8d8b2c7d1e9659db86d. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a29023ac-9abd-419c-a608-3cd3d59b276e.json and https://artists.proofprofile.net/proofs/artist/a29023ac-9abd-419c-a608-3cd3d59b276e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Debussy: Cello Sonata, L. 135 - Brahms: Clarinet Trio, Op. 114
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 0x7ec2283da650f746270dfd9a88b194dacc2433d9eac5d8cb36af1a3e75a627a2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUW61600133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59731e150117d249a583e49641ccae57e402ea989308513f770c8f48f1726645. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUW61600134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92639c386e8cde912c624ed36e3f94341589d4c2bdf05e7ae4b6b9f3e59afe6. 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/USUW61600135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde667b504f80c212f458095e074789b7e726a65cdf3546c8d31d8ead11de0413. 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/USUW61600136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5559511ae8c817df02766b43419d17277835a6c2c3bfbf2e1538074de237f46b. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:17:15Z), 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/USUW61600137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85478365d9cf4aa0e818ec742a6e5ef8b32dbe6bb836119b167d313709efc978. 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/USUW61600138.
3 Classic Rags: No. 2. Epitaph for Louis Chauvin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8804b309ca7a8d31d85cd7f7f66f3c927f6828ee7f6606336f44a1ba37b74881. 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/USUW61600139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5d1e8c2c131276288dde2f3dc355a6a6865eec86fe74ef9edb57c2dc0077e8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUW61600140.
The Garden of Eden: II. The Eternal Feminine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cca1ae2479494a24fc007bf7f82572eee6e8518519c3685ada25dae6b036ba. 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/USUW61600141.
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 Garden of Eden: III. The Serpent's Kiss
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f82ca02345f4f9f5e847204b7afde10bc57e11d796ede9d9b4c5e5831a745b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USUW61600142.
The Garden of Eden: IV. Through Eden's Gates
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63329d0653bba85394c4162c7e0fc675153d4a7b5e0a9667c05d418c0857117. 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/USUW61600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce0460eed5faca99f7f50998aa2317bc11bcd6269a1de4d5494717aa05fddaf. 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/USUW61600144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a68018b1db31c64d921960f33ce3518d92a50360f757e93163e5ce50c861e9a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USUW61600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e2ef353d9110898988b0c27c40d9c4ccd1e44076ce3674f746aa3ac95db83f. 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/USUW61600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f57a530a84c80ec6b4b01a395b9ae203349c7a70d5bd3eaf8d140e9cd51b92. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USUW61600165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e6ef95bd9c70582b5f86a10639cc8c30d4b64eceac63ddec1dc7d3ae54135e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USUW61600166.
Beethoven: Piano Concerto No. 4, Op. 58 - Violin Concerto, Op. 61
2009 Van Cliburn International Piano Competition: Preliminary Round - Spencer Myer
Spencer Myer Plays Preludes & Variations
Symphony No. 7 in A Major, Op. 92: I. Poco sostenuto - Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860a172fa50271f0edc4964b6bacd890ede58b54f1ca138bbaf4088f6ec2c892. 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/USB8U1058941.
Symphony No. 9 in D Minor, Op. 125 "Choral": I. Allegro ma non troppo, un poco maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1980877699ef98547339adfc876c14644e8cbfc4432ea07d1eab16d310e3e8. 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/USB8U1042429.
Symphony No. 9 in D Minor, Op. 125 "Choral": II. Molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5ecffb35192c0c9f9902172be58233f64b425344622c5c389a87a286f2e57a. 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/USB8U1042430.
Symphony No. 9 in D Minor, Op. 125 "Choral": III. Adagio molto e cantabile - Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c950b359886da1ab54b038eb9094bfd86d6223dd7cacbbaa003a3b894bcefc. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:20:36Z), 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/USB8U1042431.
Symphony No. 9 in D Minor, Op. 125 "Choral": IV. Finale. Presto - Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efc478d2221ed96dccea76e0e6bbba6de5a0dce607e13beebaa55c9c3975274. 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/USB8U1042432.