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 0x3860b3d56b510790598276ee1e7fd0cc6bd93400a6c8e4d212e3f3d6562dd2ed. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07c0eb34-dfd4-46f9-bbe6-8d01c4315bdb.json and https://artists.proofprofile.net/proofs/artist/07c0eb34-dfd4-46f9-bbe6-8d01c4315bdb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dark Eyes (Dmitri Hvorostovsky – The Philips Recitals, Vol. 3)
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 0xf67a24808479672cf4294ea2a86f2ee01333eb6328c8a774c6f4db74c5dd138c. 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/NLA509101412.
La traviata / Act II: Di Provenza il mar, il suol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c588cdbe8f399d4332d6367e86f916380f5ad1afb3c5e3aa163942228f9fc1. 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/NLA509004204.
Il Trovatore - Act 2: "Il balen del suo sorriso" - "Qual suono! o ciel!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c512fd48b22f5627f8a8f462462f0b6245f44e11ca63a9faf6af09599e76771. 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/NLA509004213.
Orfeo ed Euridice, Wq. 30 / Act III: Che farò senza Euridice?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23aec6911dc164df88e893643619aea7440d6ff9b2907a9e9a4c99ac33c97d4. 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/NLA509700808.
Don Carlo: "Per me guinto - O Carlo ascolta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efb5165f178e3448d1b423f335502b39a9fa513a50bb5a1f85134b5b83f08c7. 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/NLA509004214.
Tito Manlio, RV 778: Se il cor guerriero (Arr. Papp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebe077ef32242796236368216c6e7ad9f67fe908b96ec0e3c8e94d217080bed. 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/NLA509700802.
Il barbiere di Siviglia / Act I: No. 2 Cavatina: "Largo al factotum"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810ab94a7bf5b7a85cdc70138725a361a5e8aa47395d733986906d64f563d926. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLA509108001.
L'elisir d'amore / Act I: Come Paride vezzoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d638f543c03f164b36e77d484f390907998e37419e9172b3029b8d8698227d. 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/NLA509108007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad1e1a9e86a89e2f56f64de4ddc1d2e4890e094d6206a8ec3f83a21e0b5a5f7. 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/NLA509700804.
Lucia di Lammermoor / Act I: Cruda, funesta smania
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7792e54936bba7d3c3e78a26d3f910fb1decb8cf1a5e5cc7d75fbc377607aa3a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLA509108012.
I puritani / Act I: Or dove fuggo mai?... Ah! per sempre io ti perdei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31611e26b6c8b232c7410fb55823957735e237322179ef8e40bec50f0b8dd62. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLA509108010.
In the Mysterious Silence of the Night, Op. 4 No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf91b2bde8c70fe29aaa0f7474cf6e7ac1080448fc1098795a49c5731d519f63. 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/NLA509005615.
Don Pasquale / Act I: Bella siccome un angelo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cf21825cd75648ed80de41d08511bea69f46b1cd64284a99cace67296a9735. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLA509108008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a19c0d20fd82dc410ce7d49a3ea3b321831cdc7b5524f8413402f4af4a25b3. 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/NLA509005612.
Eugene Onegin, Op. 24, TH 5 / Act I: Vi mnye pisali - Kogda bi zhizn domashnim krugom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7192e235a918959d7263d1b21b66c7a3057c13454fee49fc94616b873565b23. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLA509004201.
Eugene Onegin, Op. 24, TH 5 / Act III: Uzhel ta samaya Tatyana - Uvi, somnyenya nyet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb47202e87c9c6c496ae774a0567b4e93804368da48f764661c0a054e8de91e. 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/NLA509004202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf473c4199f794ef826705a193ec026536a393228cbefdf6e51a8d0321ad72a1b. 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/NLA509005601.
Pique Dame, Op. 68, TH 10 / Act II: Vy tak pechalny
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56cb0342e7655518a797566507026a8da4e4a33d792032a91474d2e98f29e13. 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/NLA509004203.
Iolanta Op. 69, TH 11: "Kto mozhet sravnitsa"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de63aeb8749ea489ec3d1abde8abdd4d958a7c2d19bd57dbf020acc14bffeab. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBBBA9350230.
Songs and Dances of Death: No. 2, Serenade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597ba33df9d7ce129e0054b94eb9caedb6ea946272e334704332e1bd3c731a92. 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/NLA509304112.
The Demon / Act II: Na vazdushnam akeane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe866b3978ab60911bdfe84d499e4c2ed354334a5632e8b302605c0ff0b9d8703. 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/NLA509304107.
State Symphonic Orchestra Of Cinematography
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7059f9a64fe4f3f8a05c9f7592dab0f93be2c6b8bd954f4e58d042e57d838f64. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLA509512002.
Kagda, dusha (Elegia) (When, My Soul, You Wanted)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352613f5da77379dcec1ec2b04e275e6f5b18d853fb65cc42a92fa94128c31fd. 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/NLA509101410.