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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9aca42e8b77b5213b92dcd5b0e7705b071f4d7d1f1781a087194ff377a21f9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/654e6f4c-5b12-475a-bc71-18ac0057f795.json and https://artists.proofprofile.net/proofs/artist/654e6f4c-5b12-475a-bc71-18ac0057f795.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fauré, puccini, debussy, guastavino - carlo balzaretti, kuniko kumagai piano 4 hands
Merry Christmas Mr. Lawrence (Main Theme)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32738467d42f6f72aae795069bb43e181579ef593f7714dd79ee1224c9b3597f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITD541501237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb9b0359b86f57acee53cd1a8687296e1325d5f590a4ee0a225e090aeac1109. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITD541501239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a3121669f0706de0fccde8d312883982fd5b68c379cfe6c85a242d3ff67db7. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/ITD541600215.
Balzaretti: Variazioni sul tema di Heimweh (After Lyric Piece Op. 57 No. 6 by Edvard Grieg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fcfefcf874acc730f059607627ca2b1e6839932cd529173937bad179818295. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITD541600733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d4107738079d599d04e9b9f52d89a5dfec1cbe006c0fe36e695f67cfa577a6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITD541600648.
Piano Suite (Tribute to New York and Sendai Terror Victims)
6 Studies for Piano "Around the Film Music"
6 Studies for Piano "Around the Film Music": No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256c7f69fead6ea5e41ad76488244db3a3efc34f2979452194475fc5f7306d0d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITD541601213.
6 Studies for Piano "Around the Film Music": No. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c48e8a72bf39fcaed0a8ac08352870ecdf155106531684e01133f8b85117c37. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/ITD541601215.
Studio sugli Accordi No. 1: CHG "Hommage à Erik Satie"
Schubert, Mozart & Schumann: Piano Trios
Divertimento in B-Flat Major, K. 254: I. Allegro assai - Live Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab0377b674cf14c0e70c8f03005f4182e8fd81351ab481670029f60af9c6ce8. 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/ITD541900106.
Divertimento in B-Flat Major, K. 254: II. Adagio - Live Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa009f63ecac8ca046a3f55d124ed57a95a643afb55e468d9a0938984c6c88e0c. 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/ITD541900107.
Divertimento in B-Flat Major, K. 254: III. Rondò. Tempo di minuetto - Live Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16833662295edf31606308515e2af85308aa268c2e4facfddef2523053fbf823. 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/ITD541900108.
Carlo Balzaretti: Modern Italian Piano Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9665b5e54c7554f4ce567ec1da4d9b1d822f4722a1d35bc751e61a2d15217d0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITD542100914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f00eb29d6bca794709c34a3855fd9c82afcc87b8677b6a17ea01cb613c5d36e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ITD542100915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867c6a192a1ae147d7707406a130e2cdb85e28d56e8f43cc3056c0f8330d2b46. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITD542100916.
Improvvisazioni sul Preludio Op. 28 No. 20 di Chopin
Carlo Balzaretti: Suite Four American Songs
Piano Sonata No. 17 in B-Flat Major, K. 570: II. Adagio
Mozart (8 Hours of the Greatest Mozart's Works)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eca998a9e2658eb6b7ad8e76e809d1000d9d61256293134e1701c310fececf3. 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/ITD541600070.