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 0x144764309416cbcb46e4bf43c2c3223f8ca31c9875fc573de98a9933f41ae1e8. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a333e04-9b87-4383-a31b-922a9bd0711d.json and https://artists.proofprofile.net/proofs/artist/1a333e04-9b87-4383-a31b-922a9bd0711d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xb4587380f17950b27dccdcb6650dacb415433c4477b436807ec77312f8c3ede4. 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/ITV701108201.
Haydn: Le ultime sette parole di Cristo sulla Croce, Hob:XX:1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b389022ab52d4807ebd2da493493285e96133288edb366f95fda9c6749924b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ITAWZ0304001.
Sonata I - Pater, dimitte illis, quia nesciunt, quid faciunt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2dfc9ab6dee45c34a9aad219404154d72dc1d72de0f880e78fc6c0e2d7c1b4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITAWZ0304002.
Sonata II - Hodie mecum eris in Paradiso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496aee056bc2d3d7c283c1bddef177dfd887ea72f532af53911e26b737dcb266. 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/ITAWZ0304003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3727765fb39722539935bb10fdc2fc0128da204bfaa2fab1aee4efc4f15ddf. 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/ITAWZ0304004.
Sonata IV - Deus meus, Deus meus, utquid dereliquisti me?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465aad0af1df2d248dc31eba3e1eee09a89a9fd05cdd159a9bf03825be9c685f. 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/ITAWZ0304005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29737d6fe6735d1a6d94f9b5c60ecd119a4fe57a471b0b8e08322d507aeab16. 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/ITAWZ0304006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec1c98f3e3cc408e5aa43325e56d91e94c2aaaadb6b32207d6e4906c75c794f. 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/ITAWZ0304007.
Sonata VII - In manus tuas, Domine,commendo spiritum meum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f62e47b1bcb18181623b3efdb4ffa94994c6a7c9bee7fac272e52d593b4a9d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITAWZ0304008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f1baa912a1d1dcbf3d9efefc38f21ac94476fc2d51da66814410eddac12a6a. 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/ITAWZ0304009.
Magister et discipulus: Frescobaldi & Froberger (All'organo Cesare Romani 1613, chiesa Santa Maria Nuova di Cortona)
Bach: 16 Konzerte nach verschiedenen Meistern, Concertos Nos. 1 - 5, 7, 10
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1942c67aa91ee41eeac855bb9a584ea275f96c608a8775a23c3e1237653435a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ITK791327925.
Ave Verum, Organ Music in the Age of Enlightenment
Pasquini : Docendo Discitur (Organo Fratti Sala dei Concerti, Accademia Internazionale di Smarano - Trento, Italia, 2009)
J.S. Bach played on the Gloger Organ (1764, Konksberg Church - Norway)
Arcangelo Corelli : Concerti grossi, Op. 6 (Appropriati all'organo da Thomas Billington)
Pachelbel : Hexachordum Apollinis (1699 - Organo Ghilardi, 1992, Chiesa Santa Maria Assunta, Smarano, Trento, Italy)
Fiori e fioretti del Frescobaldi (Organo Giovanni Battista Rejna, Chiesa parrocchiale S. Bernardo di Colorina Sondrio - 1696)
Poglietti : 12 Ricercari (Organo Nacchini - Dacci, 1752, Chiesa parrocchiale di Madrisio, Udine, Italy)
Battaglie e lamenti (Organo Callido, 1792 - Duomo di Venzone)
La Stravaganza : 6 Concerti, Op. 4 (Da Anne Dawson's Book, 1720)
Bach, Mendelssohn & Brahms : Organ Music (In st. ambrogio's basilica, milan, organ built by balbiani, vegezzi, bossi in 1651, op.1675)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986a3bd39a8234c96d9a0791caa045a9e383ce6cef91b3f388e40c2e5289d40f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITK341001701.
La Toccata (Organo F. Comelli, 1788 - S. Maria in Colle)
Essential Classical, Vol. 1 (50 Beautiful Classical Themes)
50 Symphonic Christmas Pieces, Vol. 1 (The Finest Classical Selection for Christmas)
Carissimi: Jonas, Lauda Sion & Missa "Ut queant laxis"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcd20abdbc4c78ee29d96120ff997c820d6cd307c549101782d9b013f19a9b5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ITJ090061021.
L'Offrande Musicale, narratio brevis, BWV 1079: Canon perpetuus super thema regium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc49b084c73d3ebe1f47a76de67e31b3a9d5f776826a71a95bc89163298f35b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRZ179903490.