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 0xed254ac76603216e057466a60cb95543b1b723b3c5bdd32a6de5f04afcbc5cff. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11877fa4-9859-4a3b-ba09-fad0ff6ae8d0.json and https://artists.proofprofile.net/proofs/artist/11877fa4-9859-4a3b-ba09-fad0ff6ae8d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
6 Pieces for Piano, P. 44: No. 3. Notturno. Lento (Version for Harp)
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 0x095efea8e3cb7078ac708703dc20b89c1ed87766225340a31f0dd1d0936727ae. 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/DEN962004420.
Waltz No. 19 in A Minor, KK IVb (Version for Harp in A Flat Minor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255baffa8b8bf34570349db5d3fd28c66f1b8b59d52dcfac5a8ce05472259a7d. 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/DEN962005150.
Waltz No. 14 in E Minor, KK IVa (Version for Harp in E Flat Minor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9f143b36551defd91507819da04e198b14d8359fc0c774d36b33857ec27274. 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/DEN962101790.
Nocturne in B Flat Major, H. 37 (Version for Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb019e950a79c5675048ebb2bafea35c2b64b50f58052e148d015d83e56aad1ab. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEN962101820.
Nocturne in G Major, H. 58 (Version for Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a534af76ec72c6672cc30cabd6989a1043e71e0b4b320cad9edbe40f68e948. 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/DEN962101830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f76537c36b21847263fd667c15efbbfc38298b96a301c96b1d85d6f7a8dd9b. 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/DEN962101840.
Suite for Harp, Op. 83: IV. Fugue. Lively
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafc3dc7ca2014aa1b0ec3bf1351e739fd211980458d1decf71d48a8b85fa17a. 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/DEN962101784.
Waltzes, Op. 34: No. 2 in A Minor "Valse Brillante" (Version for Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b1a4a96e5fe652c7d8807c53af2c1814be51416349542481b3c46b50ccd4a1. 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/DEN962101900.
Fantaisie pour harpe sur des motifs des Contes d'Hoffmann d'Offenbach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699e7400e0b29a8126972153f76ae857de1a4c058fb4b2e3657c8894473efa16. 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/DEN962101800.
Nocturnes, Op. 48: No. 2 in F Sharp Minor. Andantino (Version for Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc931084e2c5297424d2e33887c2395d1de4cb4bb5b827c33a1c7a7b6bf3697b8. 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/DEN962101850.
Soirées musicales, Op. 6: II. Notturno. Andante con moto (Version for Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14c60390d170796b840ba19bf7da659155eacbc45b7d9403b8cd2ea890567c5. 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/DEN962101400.
Suite for Harp, Op. 83: I. Overture. Majestic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047bb7572e4067e6d219a69d41874d3a09f9c23e57969554a68b268252b6174a. 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/DEN962101781.
Suite for Harp, Op. 83: II. Toccata. Fast and gay
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb0ba5bab8e9eb8c13f1cd7a593f0e2b466f041fff31bd6431b2ea86c21c4c5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEN962101782.
Suite for Harp, Op. 83: III. Nocturne. Slow and quiet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff27273ed954c6349ae5a9f009aa013773d219545d6bb7457e9e261a72867e5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEN962101783.
Suite for Harp, Op. 83: V. Hymn. Slow and solemn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153a33a9c885a0dd18fda7c4dc5ef7dc7f0f59404c4cec412a1701304d04873b. 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/DEN962101785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78046bd3785745653352b4f1e53b587d67d34ecfd18ddcd769099700a795573a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEN962101810.
Images, Suite No. 4, Op. 39: XII. La danse du Moujik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053446d08f048409c3238c07e54d2c651f73715776c5809e9994743d4a0f381a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEN962100990.
Three Character Studies: I. Nocturne for Left Hand Alone (Version for Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7f27ed715bfa2c0902ab6cf2a90ef29e415a88c18a809985d0c3a49c1c5ee7. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/DEN962101570.