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 0x890860b471919cdfb61b2cbc4e2abcd822d0214cc9f5e76ef3b9d2031124e826. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d554723-4834-4917-9806-1ab5abbcd7c6.json and https://artists.proofprofile.net/proofs/artist/7d554723-4834-4917-9806-1ab5abbcd7c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lachenmann: Klaviermusik - World Premiere Recordings (Digitally Remastered)
C.M. von Weber: Piano Concertos Nos. 1 & 2 & Konzertstück in F Minor
The 99 Most Essential Pieces of Classical Music
Canon and Gigue in D Major, P. 37: I. Canon
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 0x1f7de4835953bc74808e9e1adc664ca400ea8e379505681490daeecce010e96d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SEWDL9750007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe69484264ade3528d47ce916a8a287556208d5f9346d30ec0f1605bec763ff4. 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/SEWDL9750020.
Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight": I. Adagio sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baaa243819007bd8ee40f7c3c05d5fcb2298f558632582b81e149b7fbef93f1. 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/SEWDL9750030.
21 Hungarian Dances, WoO 1: No. 5, Allegro in F-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051082f70bb1d0c82b9609fe65f126b463847e13b9dadaaf6e5c1864652b8948. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/SEWDL9750018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36406e879235c3225c53751be20653274bf619fb095a5610e114cfb3393911d. 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/SEWDL9750027.
14 Romances, Op. 34: No. 14, Vocalise (Lentamente)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35bec1a8f26fba3f5adf7b0003f77fc068b8cca760abd6e51451581aa326f15. 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/SEWDL0716405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9baac788d25cb8d455010730f701f58d6cdff1059b298c870a827a24484cf48. 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/SEWDL9750041.
Orchestral Suite No. 3 in D Major, BWV 1068: II. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a14a7d70f1a1cf28a80f9915a38b113f6702733243e1f5db9ce08f4ed45cae. 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/SEWDL6142604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eccf7606e50d6ef33d0568337947d5204ecf205bd5d07e11fba4da5f154daa6. 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/SEWDL6142742.
Prelude and Fugue in C Major, BWV 846: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e11a08bfc01dc597f2d763e99a929ac47e5bf380e15e2ef03f838feca9113d. 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/SEWDL6142608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5a61e079175ebfff0cbe5118dfec3dcc63efecd5005802d6ae19b7bfd69e2b. 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/SEWDL6142642.
Piano Sonata No. 16 in C Major, K. 545: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eb1f97dbbf205344f71e679b4b7c5c6ce420817de92bed3dce5ef5938077d8. 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/SEWDL6142689.
Piano Sonata No. 12 in F Major, K. 332: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2d95d76ac856cb4ca2ae1b8be3cf22088a50000fd2bd5b7a3009960fdf0bda. 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/SEWDL6142681.
8 Klavierstücke, Op. 76: IV. Intermezzo (Allegretto grazioso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5279beb239f4f0d10008ed420c2bf5c3354057ce70d6945382f3cfc56c95ec8e. 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/SEWDL6142620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342e9e571b518e494ce8e439c00e0c06827469c11d1a79c3bb9ef5e1cfe0baa7. 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/SEWDL6142799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82832ed67678cf1e6948aa91ed4ad28d76ccc515ff8d901546f20c1f8c18935. 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/SEAEP0662140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c419d9f95bc90206503625cd6f49c8802df41712a76eeff652b5b0e1112d910. 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/SEAEI9634060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01da1b641c69912e47c046bf6d6bdf3f16bd8f2d30897975544ec5de0e876845. 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/SEWDL0739003.
The Era of Jane Austen (Music of the Late 18th - Early 19th Century)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2f86c5f8a006f836224031954df1f3719eb04aed3f2c21969f2230d4945bea. 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/SEWDL6142781.
Five Hours of Classical Adagios (Amazon Exclusive)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcacb636963a399553b30bcd5c118285d8e76ca8b0ea16c66ed2ca12951f8464. 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/DEU241361459.
Work From Home - Classical Music for Focus & Concentration
The Cello Virtuoso: Laszlo Varga plays Haydn, Tchaikovsky and Saint-Saëns