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 0x5b2d662d0f331364239479695d2456ec7298911f3c630232ee3a320a5d70fa75. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7249ad22-bdec-42fa-93c6-21dd0c90ff34.json and https://artists.proofprofile.net/proofs/artist/7249ad22-bdec-42fa-93c6-21dd0c90ff34.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Antonio Vivaldi: La Viola Da Gamba In Concerto
Concerto con violino e viola da gamba, Archi e Continuo (La Maggiore, RV 546): I. 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 0xf8f31c600656c8c0670683d590b6e27f5c686e03613fbfde27abc3ced67a9266. 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/CH4210300136.
Concerto con 2 violini e viola da gamba, Archi e Continuo (Re Minore, RV 565): I. Allegro, Adagio e spiccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3880cba64b46cb3b7418233447c963e981ea00226d0826c3e9d0bd02b3070ec7. 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/CH4210300139.
Concerto con 2 violini e viola da gamba, Archi e continuo (Re Minore, RV 565): II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc902cbaf82acb3081a1267d51e305344c0029e57897a5cda2812ef6aeeaf1f84. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH4210300140.
Concerto con 2 violini e viola da gamba, Archi e continuo (Re Minore, RV 565): III. Largo e spiccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f85c9a6e1c7d7523788c3f7c71a27a6e2e4cf2b2d87f291a69fcfd7edd2c9b7. 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/CH4210300141.
Concerto con 2 violini e viola da gamba, Archi e continuo (Re Minore, RV 565): IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888fc0b5f11f757b44b9cc44e8c34170a71e30685ff1b332124121fb62e4cd33. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH4210300142.
"Concerto Funebre" con hautbois sordini e salmoè, violino principale e viole da gamba (Si Bem. Maggiore, RV 579): II. Allegro poco poco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b875f88d41c0ee57c11b09705b87ce68295f1f92c26409945a01a150da8a260. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH4210300144.
Concerto "Il proteo o sia il mondo al Rovescio" con violino e violoncello, Archi e continuo (Fa Maggiore, RV 544): I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349dde8328e7e1444169b09f7bf8fb27ffdd39d7fc8443befd413159b9bd640b. 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/CH4210300146.
Concerto "Il proteo o sia il mondo al Rovescio" con violino e violoncello, Archi e continuo (Fa Maggiore, RV 544): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1626cc005d3cc0932a1169453318d695fd564d5268f067f60c4890d83c46253a. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CH4210300148.
Concerto con 2 violini e viola da gamba, Archi e continuo (Sol Minore, RV 578): I. Adagio e spiccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e069f0e2bb970914616e6dcb09a5c88dff0ef8c873b8c963409840ccb4ff798. 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/CH4210300149.
Concerto con 2 violini e viola da gamba, Archi e continuo (Sol Minore, RV 578): II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7b224b795b760698efdfa4989bb2e7431336e0e99b295915034b8a58a27a89. 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/CH4210300150.
Concerto con 2 violini e viola da gamba, Archi e continuo (Sol Minore, RV 578): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fd6b7cdd149e18efa71ae4a2ab9ff3db093be6835ec4968561a7176e2e61b0. 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/CH4210300151.
Concerto con 4 violini e violoncello, Archi e continuo (Si Minore, RV 580): I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0990cd1e43e4ef64022665bc174cb5f9e8dcb0586ad332c88823299ee4b26327. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH4210300152.
Concerto con 4 violini e violoncello, Archi e continuo (Si Minore, RV 580): II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7514c1bf379537ef353b5ace31ddb009f6356f0226ee835e885fc69a02151d99. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH4210300153.
Concerto con 4 violini e violoncello, Archi e continuo (Si Minore, RV 580): III. Larghetto. Adagio - Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838a982c9545b9871f69767340754410fcbd61eee95c394c73a65a03dff65315. 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/CH4210300154.
Concerto con molti istromenti (Do Maggiore, RV 555): I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e24ba41e58cf625d2d86514accb8d8bc145a3f8cb7fa3caae8f08c49c44b46e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH4210300156.
Concerto con molti istromenti (Do Maggiore, RV 555): II. Largo e spicato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc682602f3408e7d9a6a36e070cf01a7f8ee779029b435c084e047c70c197df34. 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/CH4210300157.
"Concerto Funebre" con hautbois sordini e salmoè, violino principale e viole da gamba (Si Bem. Maggiore, RV 579): I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eebbfc2d0dd983501e4493ebc538ae785a9c2bb27ba0b8e22e6d0721a049493. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:40Z), 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/CH4210300143.
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
"Concerto Funebre" con hautbois sordini e salmoè, violino principale e viole da gamba (Si Bem. Maggiore, RV 579): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca53224586f85cc3e3214022b492d82ad4b4389eef4d40a327092b7f3888391. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CH4210300145.
Concerto con molti istromenti (Do Maggiore, RV 555): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461fceb2cc4848a106a1d5889122099b63639c4184d78d71189c1c66a53c0590. 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/CH4210300158.