Antonio Bertali (March 1605–17 April 1669) was an Italian composer and violinist of the Baroque era. thumb|Engraved portrait of Antonio Bertali at the age of 59 in 1664. He was born in Verona and re
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 0x8fa06692d1d403f9ba59a43d30b3b3367c2b716f223ee023ea6bc5915f58fa70. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6bd2ab5-6b59-4d0d-b1eb-fdb7f28dcf9c.json and https://artists.proofprofile.net/proofs/artist/e6bd2ab5-6b59-4d0d-b1eb-fdb7f28dcf9c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Maria Maddalena, Seconda parte: I. Sonata - Questa Maria
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 0x214cc238ba22bcb67860d9a5b62e036bdbb4ba5d071d54a65efd197ddcdb90c5. 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/BER181536712.
Maria Maddalena, Terza parte: XIII. Se nutri di speranza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bda47108a51da6ebcfa3ca0e7ff5ebc01de23d70888ccefcfaf0221b0c8da51. 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/BER181536730.
Antonio Bertali: Tausend Guelden. Sonaten vom Habsburgischen Hof
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394c1280074f4bed03e2d6ca868a1b93014a25c67c250a89350d37a12a7b907c. 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/DEB110000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0117cd894657b6a26663ad31bc73fc826adb5452d170272e10d23d79eb2c37df. 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/DEB110000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc6c853bb273c209369869fb797fe5c6e8e81817ef90879f63436b9556fb06d. 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/DEB110000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399b1fd83b93819fd1d6c167dee0cbf410e11cd94e8d53bf62242a89232010f8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEB110000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3925205116c3c2d1e451b41a7ef8240cdde8bd618946dcb4dde635de9c50a8a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB110000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8c012692f9b387ba23fdf3f014bdeb0946b3f5c97a39c7a13c8b63799753b6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEB110000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf989087b1dc0242c3026b944f2b95096955cb38943d1395700035bdc0ebbf336. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEB110000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f36620a11b19b4e3458fd998cf74c5a4161ee9e9615ac8b1581abb0c53b540b. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEB110000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ed2445b42b83fb58970f18c43f01800a885266ca5d136bea813f749696d73c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB110000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c6623a22ec4bd31f7b857975a42f48da3785069c77740021999eeb90d79c37. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB110000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4017072da6fca558bcf9fde7e1373e7663e9a17dedd81634ac6546ab2ad5c5d2. 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/DEB110000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e8dea13392036a40ff8c45dde5c9a25b4e99f1efff666932cf5c1805ba11ae. 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/USB8U1069307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb79aa4c8ceb5923d4d3f17789020aaff40606bf53a34ce9e3dd146708b7881. 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/USB8U1069308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5693d2481e40bb45303d749e940f4e007bb094e340bfb737bc5fcdf59a8ee579. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USB8U1069309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7811b18c77e576c510291e5c1fea95091ace622dc9acfbb01b1911bda9f3c73e. 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/USB8U1069310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450a587c8aa0cc0a30d12779e7b8a62ef8af3c0250f8e5010b2a985441955897. 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/USB8U1069311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f162eef01ed6d1a481d2973716ef3e8e8efdb575c0f660b89432045d7d4243f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USB8U1069314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534dd0cab203e1466cfb7e6d0fbf8d131298a77a7248291e977821e01b5a8546. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USB8U1069315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e380520b0c9d9cef740122f22bf20228e1435583b5616386fbfcd8cdecdeb8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBPFW1800139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40583639e12aa55ac466c26c876f01942f6f720604cb68eca6b16526c373a676. 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/NLY331502269.
Sackbutt: Trombone in the 17th and 18th Century
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae4b09ad3c2f72f170e8bca4ab227e91defe2b1eb125abdb6302e607894d6c5. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/NLA460910013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3f017d44a045c17385a32cae56fb2b0251a74f9bab5c19fe4bad2b6a9b162d. 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/CH1492344407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d0e596b865bd3aa0b544ea2537ed99019db71d3325c289515867970178282e. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEE219753925.