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 0xc3fee4f075c7219aac985b4bb2db69105ee697090304760c63131e074f033c6c. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d09606cb-2986-4180-b767-23822904dc68.json and https://artists.proofprofile.net/proofs/artist/d09606cb-2986-4180-b767-23822904dc68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Classical Collection: The Essential Moderns
The History Of Classical Music - Part 5 - From Sibelius To Górecki
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 0x3f5ccef1714425979f467e87d46b6f668b5f9fe632be1f30d271ec9bd459d087. 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/GBBBA9660020.
Piano Sonata No. 17 in D Minor, Op. 31, No. 2 "The Tempest": III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee569452af05f7f7634d5f5ececc2d4bde72a07455333bced6746de1f29d9a56. 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/DEN960300323.
String Quartet No. 14 in D Minor, D.810 -"Death and the Maiden": 2. Andante con moto - Excerpt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f996fb2fb60426758977bcea14bf2f2f74cba34fdbf74265e4bf53f5ac470ee. 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/DEF059004176.
6 Concerts transcrits en sextuor / 6e concert: 1. La poule - Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a403fc0cde04ca10cfbfdaa4ceecaa618e91443767ad42afa3070664a890332. 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/GBBBA0000260.
Brandenburg Concerto No. 3 in G Major, BWV. 1048: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cef5af334442da55c12678b2659ec90d1e323cd5abdc33e90d8f2a11b4180c. 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/DEF058200412.
Symphony No. 3 "Symphony of Sorrowful Songs": 2. Lento e largo (Tranquilissimo - cantabilissimo - dolcissimo - legatissimo) - Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5afc96ffb649b4920162f847451223bc80a5929e2c0bda42cb9c0bfc983ef90. 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/GBBBA9450210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de9d5d148830aa64920754038dbf01791bc1514b4602ca56e20eb67ec0a8654. 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/GBBBB0104905.
The Well-Tempered Clavier, Book I, BWV 846-869: Prelude and Fugue No. 1 in C Major, BWV 846
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809331f46e5c1a929ca884913ad3d9a0b85b71fc0738308ba3f1c6cd19df9304. 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/DEN960300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f76601ac4616aa99d31805e4e0c2accafadf3e9e43e389491732c27bbf1217. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEF057403195.
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
Reich: Variations; Music for Mallet Instruments; 6 Pianos
Variations for Winds, Strings and Keyboards
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae67b3d7404c4d0bdd6deedf1b513d593981cac82bc3e848aaf2e05726bfbbb. 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/NLA508312801.
Music For Mallet Instruments, Voices And Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2aeb1bd09d4697e06cdba6f8f83457757d0bec0b6a20e58c644b7e1054ee74. 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/DEF057403210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9e4f8d6840250bf11db8329491e2886a6ff07476817933f91c51c8918acfca. 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/DEF057403200.
Reich: Six Pianos; Music for Mallet Instruments; Variations for Winds and Strings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a3f028380780730a54b2bdca7ed1bf7ab93f5d6c08d2766c14b5bdbd4b7c85. 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/DEF057403191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cac0d599998b1590715cf6d7c36cea538ad8ba0395f19156476bbb751ebc9b. 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/DEF057403194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2c6018d7e5bf6f3e500054554180458f65b8ed270324614a5b7f243630b226. 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/DEF057403192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27388eb60fffd722aa2c65b13017d1d5320341687dec7ccf81ad72074f5240ad. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEF057403193.
Minimal Goes Popular - Klassiker der Minimal Music