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 0x811fbdc454fc28e512f966a3a0980e0bc83ad1bc0f431248f3a4b9c2b595bf18. 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/a466a134-a020-4e04-956d-ca8d8b24186d.json and https://artists.proofprofile.net/proofs/artist/a466a134-a020-4e04-956d-ca8d8b24186d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
C'era una volta il west: II. C'era una volta il west
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 0xaae68c362968d226a65facc75005f6c1aa3681f9304e8e246d4b23fc62c48f65. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLY331903808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8a73821e3f4ce7badc0c22a439ac35696b0dc602ecee2b9f322d7dcbdae0e1. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/NLY332000039.
Sonatina canonica, Op. 196: II. Tempo di Siciliane. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3090a75c6eeb6a79460b89d4029980f9141f44e257bf4f21d9998580b311d896. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NLY331400484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68021828dd82c2d7755f0380a8f86fb43615ec0c4bb571faa831c26c2f60376a. 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/NLY332000586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e5be52b13e7a5d3c8d400dc1628422c6c9cdd3fac8055a7ee119fadb384912. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NLY331804973.
Sonata omaggio a Boccherini, Op. 77: II. Andantino, quasi canzone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc02865fb1575e0b1d28baf9cd770149c91b44829f87b6c4983f06e0dd0e9a8. 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/NLY332202490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17dc044333eaccceec8267771d2a6c38a878cac3a778d95693d5fcebffe8fa6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLY332103303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96877a1ddd4e7f7473c66f7d4473eca2a8f5811a9e831eabfcf7746f6ad39fb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLY332001553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3cd0664e11592b3185294ede67ecef025594ff9ba615b7a4a87cd563d7ef6c. 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/NLY331801337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1ebce4d3f87c3657848da54116237f18599bf6e024e1020988e22415b53c40. 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/NLY331700759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488d6b11bb10f486fd47390bbad9efd5e4e61f4552e67e8df6db7aadceaf763e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLY331700749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9814233ba3372be5e201f046e3856c44eefc314669166ac9b004d38769cf9e56. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/NLY332202495.
Sonata in A Major, Kk. 208: Adagio e cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7e5ed663b200bf425a4f261333082df10b6cc1948fbf27533719db47174165. 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/NLY330904666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7f76b482aa24eb2deef53c5786997110b34411ad3bf10f37d4a6a431611ece. 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/QM4TX2029698.
The Musical Manuscripts of Monte Cassino Abbey (I Manoscritti Musicali Dell'Abbazia di Montecassino)
Tirsi non giova il pianto, Archivio di Montecassino, Fondo musicale, 2a - 3/1: I. andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a562e2c88f53a0d7e220467cc7e14567e32532db525925fea2045f27812ffe0. 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/ITDF61806005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1fb8c8febcefb0195560421e0324a2104552e2da0393fb15da3a41b49cdacb. 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/ITDF61803012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56355bba58554a59b9be48815390a1718525677c350e2ec58f38d516ad91a53. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/ITDF62521045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4401304c350aa4f5c977ede48339b9b0286b063b4a1a40b8db0073a282a22e75. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ITDF62421028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773d0a4ac3e96869ba8d221b0b7d41b5ec378cdcf0a54286bfc63ed19d34e690. 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/ITDF62221017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e029fb6c37ca739d708b9fd140336c3bc729acee805c41907cec27d6c75e8bb. 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/ITDF62221016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b63f44b8b07393b411a83e776a11d7d66a2e2aadb6d309fd7c684c06a9202c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITDF62154002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461fe00ff208501574fc112a7fca3f32fdd32f53b0d52b33d852de1d268ff417. 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/ITGJ61900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59132e02f2fae27da5ba533f5f7c77adc40a107b77df0108cac9f5e4f946e73. 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/ITDF61811002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7598ed167d990639eea4f8d1e2d153290d61ff9362eaf1405332810fcb08b9d0. 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/ITDF61807005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827b592f3ad2b5480dfe03e1faea89ba6b88ffa5f7734318d2fd59d881863a56. 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/ITDF61805038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbef9cf8a2b91c28f5bc3912563313213245df233596dd52338ad9bbd70e4d2. 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/ITDF61805036.