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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ae686ac9bb1b6f8ba0b8cf52dbf7b90a5ebaf3ccb3c8b4bca00e4525109f3f. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/303487ab-5a34-4792-9099-653ed313fbbb.json and https://artists.proofprofile.net/proofs/artist/303487ab-5a34-4792-9099-653ed313fbbb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dall'Abaco: 12 Concerti da Chiesa, Op. 2
Dall'Abaco: 6 Concerti à più istrumenti, Op. 5
6 Concerti à più istrumenti, Op. 5 No. 1: II. Aria. Allegro
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82ee10c0a32ae181bffa057e2713a210b5b6a75b808bb323cbc4fcc31722347. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6V80958019.
6 Concerti à più istrumenti, Op. 5 No. 2: I. Allegro e spiccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b11aadde25d829b61b9228633ec7ae5d4370021905a910b40b93b3ae8e4138f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6V80958023.
6 Concerti à più istrumenti, Op. 5 No. 3: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fd6f6acfb241f3ddbe4ba629119670e7fdd194bd553af6dd751084b1e98fb5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6V80958028.
6 Concerti à più istrumenti, Op. 5 No. 4: III. Loure. Adagio e spiccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335c5a0a070e4308be1bb209022943fc4493e8d3c1ebeb3e40f951c7896572ca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR6V80958035.
6 Concerti à più istrumenti, Op. 5 No. 5 "Oboe Concerto": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7775026bc7a88fa38eae190bab570ea8d1af555d76344946daeb16393069aac. 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/FR6V80958038.
6 Concerti à più istrumenti, Op. 5 No. 5 "Oboe Concerto": II. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f11a0bf96089ce4daeb6bbc86c29a289d00a472262489a84b0b9de19fd1fa23. 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/FR6V80958039.
6 Concerti à più istrumenti, Op. 5 No. 6: II. Aria. Cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2593f3307281545cd919fb0afa02cce51551e62d49dfb0e9db627a68f9e66476. 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/FR6V80958043.
6 Concerti à più istrumenti, Op. 5 No. 6: V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc03df0b621f58807e5a2b19341a05e7f5bb7c990565508850e8418ff721a8c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6V80958046.
6 Concerti à più istrumenti, Op. 5 No. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000143c36fcadbc95bee2b25ef55f7bbf69be61dcbc437a92a6447d073264365. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FR6V80958018.
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
6 Concerti à più istrumenti, Op. 5 No. 1: III. Largo e cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3fbc3cb6701b29e6d324884cab9e3f2137b3384a41f4fafe8b255f8459e9f9. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR6V80958020.
6 Concerti à più istrumenti, Op. 5 No. 1: IV. Allegro, ma non presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe882ac28d90859e32cc72a5e33a1674a36c8a64de20999ddf6f9a9aba9c9d001. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR6V80958021.
6 Concerti à più istrumenti, Op. 5 No. 1: V. Presto assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149398d7affd93c1cb75033824f2d6cac35cc87da331323a2443a3f43979c78a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FR6V80958022.
6 Concerti à più istrumenti, Op. 5 No. 2: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91116833b5bd730b20472ebd22d1176d68a05d70d2033dfd65916dea1fcd2f43. 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/FR6V80958024.
6 Concerti à più istrumenti, Op. 5 No. 2: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa72a5d404b454589842f9720b299ff9d0a5f3c768b0988095cabcba0549cae4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR6V80958025.
6 Concerti à più istrumenti, Op. 5 No. 2: IV. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cfdcf576d91d1cfafb3839cc38c6bca42b83c1e726c077d846aedde7225776. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR6V80958026.
6 Concerti à più istrumenti, Op. 5 No. 2: V. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf881bc574f046b03227bd68862c2eb6354abe5cee65d1eb9368a5a01e66a8226. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR6V80958027.
6 Concerti à più istrumenti, Op. 5 No. 3: II. Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf471399179255e4501e6a9f3bfba3ebc40887ee5fce27e0180a05c29c1beb31. 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/FR6V80958029.
6 Concerti à più istrumenti, Op. 5 No. 3: III. Presto assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc871e787d1e355b71ff68b1a1b733b633c286f0bde0d09623ba2fdbd5b78bae. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR6V80958030.
6 Concerti à più istrumenti, Op. 5 No. 3: IV. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8cee8f722f85bb2396410e756535e274fce2bd3de35d4faf71400760324225. 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/FR6V80958031.
6 Concerti à più istrumenti, Op. 5 No. 3: V. Passepieds I & II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33678e62420bcb0aec81a48399ebe1ea603fa40a8251e0d31d12f6e983b1da17. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR6V80958032.
6 Concerti à più istrumenti, Op. 5 No. 4: I. Allegro e spiccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ea112a97be2ec1cee78af4d4a1ca6f5d42ce3b9c5e4a3ec8f48ab9849a6160. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR6V80958033.
6 Concerti à più istrumenti, Op. 5 No. 4: II. Aria. Allegro ma non presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f20a68fb3e3a02d45bcdcaff48c70507a0469b6ea9f0e001db685db61d82238. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FR6V80958034.
6 Concerti à più istrumenti, Op. 5 No. 4: IV. Giga. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd75529d4b5c445818547cb294e22a2320a7631134434eb315bb6829cc9e2e43. 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/FR6V80958036.
6 Concerti à più istrumenti, Op. 5 No. 4: V. Passepieds I & II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c60f00483919129cde2a24b5e5bda10c49ececfaee5fd69e416f6f296f45c96. 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/FR6V80958037.
6 Concerti à più istrumenti, Op. 5 No. 5 "Oboe Concerto": III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ac35c8a3593cf5993034292c11cea1b779ffabe7260b4a959ffe6e8349bd9f. 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/FR6V80958040.
6 Concerti à più istrumenti, Op. 5 No. 5 "Oboe Concerto": IV. Rondeau allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2155e298534037128ab0f3cdc8cd67202223c9c642fd132fe9672391c116dae2. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR6V80958041.
6 Concerti à più istrumenti, Op. 5 No. 6: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe621f167835dc6eae032fb80c52696a8ab7dbbbde65a909beba6c59f022084bc. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR6V80958042.
6 Concerti à più istrumenti, Op. 5 No. 6: III. Ciaconna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c59ccff68357b747d739887c2132ccf4d2ca576725f12f6f6247707311f577. 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/FR6V80958044.
6 Concerti à più istrumenti, Op. 5 No. 6: IV. Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544bbf1995bbd729cf0b0f8235e055dca60ab50209fe6185870edaa036c4d0cb. 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/FR6V80958045.
Instrumental Music Around Christmas: Christmas Across the Centuries
Il tempio armonico: Antonio Vivaldi – 4 Seasons of Love