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 0x825558e213090a0bc584527baada73d5cec9591cc6682caf8e85d6afad392841. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfb74ba7-bd05-4417-bfe9-dc120f18b3f8.json and https://artists.proofprofile.net/proofs/artist/dfb74ba7-bd05-4417-bfe9-dc120f18b3f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'800 organistico in europa [All'Organo Fratelli Serassi (1852) Op. 611 del Duomo di Valenza]
Lorenzo Perosi: Missa Pontificalis - Missa Secunda Pontificalis
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 0x2c8620e53b40e118eacca69ae6cf297ff77ca5d4d6bab6728495635ce2ee2c72. 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/ITGRR1900119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3df8cafe643cc75be47b7898343e7701daf7e1cf0985f7c873e39009fc11f07. 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/ITGRR1900120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddf5e3ec8febd0f40a880a5cc468c0edd5725019efad18af02c1bb2faa21923. 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/ITGRR1900121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb7db277ff60b80167cf043cffa6e75236b176b5806cfdb070040ba54c7417c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ITGRR1900122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704dd1c7811ebe2d040bfe63bfb161ee30467a1808acc5afacc0bee98914c935. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITGRR1900123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436dec945f4e72ba8fb170a26e189c3a529b75b1fd553801f9e1bd5b713d012a. 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/ITGRR1900124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ba02a8dd1a9630607a90305f51c29a6d90665deea3b3c1f528b019717b1438. 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/ITGRR1900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44617ad5d5007688871db00c01e114950c6586cf308bc1f0ba8c669c1f737d8c. 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/ITGRR1900126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25471593321b1d968831fcdf4e03db47f97a17791eb47fa3d88ca48e4bf41e85. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ITGRR1900127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d9d18120c6ce6b7599e323cd47661be4d7d9e1acdf451389a7fce3f04b7706. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ITGRR1900128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39984b60906282b93f8a40ef3a234aa1845e1dfc4826f53eb5bbdce61b6367d0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ITGRR1900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3757ed1b1ecf8b1fa98f8974bde68a370f6d7f9f7fd45334d6f4ab7e149a0218. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/ITGRR1900130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd23a9448fbb92e361ce1d32215b95803c1ceaaf5d5f11c8e01ef66e2b39c655. 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/ITGRR1900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafbad502a6852202ef539071d19b763cc7e5f0a1b20fda635d941487d16e01b. 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/ITGRR1900132.
Nosetti: Intégrale de l'œuvre d'orgue, Vol. 2
Pierné, Meyerbeer, Mendelssohn: Il Grande Organo della Cattedrale di Messina, vol. 5
Vierne: 3e Symphonie & œuvres choisies pour orgue
L’orgue de concert, vol. 9 (Grandes Orgues Zanin de la Basilique Santa Rita, Turin)
C-M. Widor: Grandes Orgues de la Cathédrale de Messine
Barber, Campra, Couperin, Saint-Saens: Il Grande Organo della Cattedrale di Messina, Vol. 4 (Transcriptions célèbres pour orgue)
Il nuovo organo Fratelli Ruffatti della Chiesa del Santo Volto Torino
Il Grande Organo della Cattedrale di Messina, vol. 3 (L’orgue de concert)
Il Grande Organo della Cattedrale di Messina, vol. 2
Bach, Franck, Sibelius: Il Grande Organo della Cattedrale di Messina, vol. 1
L'Orgue de Concert (Grandes Orgues de l'Institut Pontifical de Musique Sacrée, Rome)
Sonate No. 6 in D Major, Op. 13: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb114eb33af7d87dd811a7635f2d119c94be47259c6f1cd41f7c29ae94d0ee968. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRY220005243.
Sonate No. 6 in D Major, Op. 13: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b2d55cd9ca7209bb9beb2ec321fe779744c3a14fa9826d61cbad9b96957b46. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRY220005245.
La Musique d'orgue italienne, vol. 8 (Les Grandes Orgues de la Cathédrale d'Alessandria)
Camille Saint-Saëns: Messe à 4 voix pour soli choeur et orgue
Aux grandes orgues de la Marktkirche, Wiesbaden
La Musique d'orgue italienne, vol. 6 (L'orgue italien au 20e siècle)
La musique d'orgue italienne, vol. 4 (Le Style Théâtral au 19e Siècle)
La Musique d'orgue italienne, vol. 2 (Le baroque)
Musique baroque italienne pour trompette et orgue
Les Grands Peintres et la Musique (Famous Painters' Music Collection) Vermeer, Vol. 14/16