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 0x2ba77cf2372f44733441450a16aaab7a05e7218b6899ce46a654f1d5db8df6f9. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6589c30c-535f-4eea-8f9d-94965ee4eb78.json and https://artists.proofprofile.net/proofs/artist/6589c30c-535f-4eea-8f9d-94965ee4eb78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Robert Schumann: Kinderszenen, Op. 15: No. 1, Von fremden Ländern und Menschen (Arr. for Violin, Cello and Piano by Trio Dichter)
Aria da suonare XIX col violoncello e spinetta o violone: I.Adagio
Giulio Taglietti: Aria da suonare XIX col violoncello e spinetta o violone: I.Adagio
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 0x8f77f77c6537b1d3e47ee63c0ce2d9633b73bf4fbe7c989989d247c7d94bcebd. 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/FRU622369801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f77f77c6537b1d3e47ee63c0ce2d9633b73bf4fbe7c989989d247c7d94bcebd. 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/FRU622369801.
Cello Sonata in E Minor, RV 40: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876a8c862edd3647ac054e3e15ed9a79ab638cb5f476bc36b58b705ad0108210. 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/FRU622369804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811eaa373065dc793e2eda7190d404f1d4c21b1a10e58749277d3a0f1d1b6980. 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/FRU622369807.
Cello Sonata in B-Flat Major, RV 46: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30dbb36c9cca333ea96eb903494ab53af17c63874678f653b7d27cf382009f0. 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/FRU622369808.
Sonata IV a violoncello solo e basso continuo in D Minore, opera prima: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad35b586b231cbfc9bea140dbb02df9fff0500b86db9551b5c7f5104ec08cd1. 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/FRU622369812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6329a94b807d589be3408d76ce1534a60db9a12da5bfb9a22fae711c8865130. 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/FRU622369814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899c1c7d6847f91732ab47b9927fbf2ef256b2273a1d5d29813b4ad894dd6ad2. 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/FRU622369815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b65bbda7dbfd7f68c8c2ede920c62da15e8d08b26cbf9b3600641d98f54cf6f. 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/FRU622369802.
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
Cello Sonata in E Minor, RV 40: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd632ac5fe7e5d6e85b1dc0414937e403ecfefa2d07cfe082eb1fe1414bbcdfed. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRU622369803.
Cello Sonata in E Minor, RV 40: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75a1c80c38ca04aba9443237c11ff94c6e893f4b37d976129dc3af41c8b6ad8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRU622369805.
Cello Sonata in E Minor, RV 40: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516a81f7b9a043817585d05249bb580ddc428be7e8576ca39e345a986241ab03. 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/FRU622369806.
Sonata terza a violoncello solo e basso continuo: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce475dc89946603b5622bd5446c74a11415859bd19e1d24a36e7dcffe08208a0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FRU622369809.
Sonata IV a violoncello solo e basso continuo in D Minore, opera prima: I. Adagio assai e sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8591e21ae2a7e6b3160c96b9368169fd40a06282c01dd7044f529479abcfe593. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FRU622369810.
Sonata IV a violoncello solo e basso continuo in D Minore, opera prima: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef26b0437e6aad3157995403288b7ab1a291e7d70548df240bf6774d4a4f571. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/FRU622369811.
Sonata IV a violoncello solo e basso continuo in D Minore, opera prima: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c493e764ea9507c7c31d7ef7929b14a2755a68af0c1ce2448e7e1badc94e46a. 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/FRU622369813.