thumb|right|200px|Cervantes, circa 1900 Ignacio Cervantes Kawanagh (Havana, 31 July 1847 – Havana, 29 April 1905) was a Cuban pianist and composer. He was influential in the creolization of Cuban musi
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 0x54f62f2ff88b2fdf0ebbb47597008090b8e314f620120b5394e7794f439198f3. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fd04b63-51ed-4e98-8b04-de51b4fa3aa6.json and https://artists.proofprofile.net/proofs/artist/5fd04b63-51ed-4e98-8b04-de51b4fa3aa6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x7bf37c4b7be9064eb88ef13898a91f571a66417ba5475f58758c311ae78c8d97. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:22Z), 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/HKI191068103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8f2fb56e18c02d269cf15e974f6e73fc598cc6d87250bf950dbaedeacedf65. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:12:01Z), 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/HKI191068104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec397d50687a1a325d70dbdba760e1735098a524c3f9f02e57d87c062311cf2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HKI191068105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab194e6a720b270a4208298bc9e3f728a9548505cc7851f9a64344bc3612d37f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HKI191068108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7a2e190e223e702e8ddf693be52bf992c5e21dc3b3cf9da4a9d36bbe6f2faa. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:05:51Z), 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/HKI191068109.
Cervantes & Saumell: Danzas y Contradanzas (CD1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fc2cc8343ced6d8b0ba11051c140171f2b28019e10ec276c9f244cae63cb1a. 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/ESAAI0256487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef254a5c669a705e153a3d139489158ce9d502fb4cb3a2c195ac3371b767a2cd. 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/ESAAI0256488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3fe69d8c26eaccef00040c50159a6fdc06bc31e619785db3356ee78b7f7829. 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/ESAAI0256536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3c41b7be81e1ab0b19768ce35749251d8df2c6306207c4808903b4eeffc7ba. 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/ESAAI0256539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29239e382de53a9e816a805408f49dd46c8d23c79830fd1d1b15ae385e1759a. 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/ESAAI0256540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa502984a3629d7f31d0e5275f2a14ef65d5d40c8bcef5f129ecb285b08c4e2bf. 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/ESAAI0256543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab881380aacb5eefe6b6b649266c5eeeef619bc05229be3cd7498bcd302b593. 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/ESAAI0256544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3000a2a459abebd7cced15bb00f771385c37d4d628bee30c16eea43d4710230. 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/ESAAI0256545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097c12eaba67b5bbf190458708c8096d4137dc317057d4725f4a63c534b3c6fb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ESAAI0256549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32446f026fce6d38feac5a0c6374946060c887958203896d3d633421b6698317. 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/ESAAI0256553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb49d4b553e06e929d4d0fc05f9a3216fa2e887ef581b4ee5d41bb9e865d56a2. 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/ESAAI0256556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f194b8811044f7f0b772993db499362c2f3bc8f938261e4e3d394dd0bf49ebe. 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/ESAAI0256557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8b9106e1479053b53ef03e517ff77016f9e851d398816c36f55ed705b3d34c. 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/ESAAI0256558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129f9f5a72311cb002cf1fc0c4940f48bb93cc14782d9f2eaeb870eb09167b29. 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/ESAAI0256559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcaf10a8de1ecadec5bda921eb1e7cce2f556adb74e1bfb27619939d518a22f. 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/ESAAI0256563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da1b062c0c8d848216961cc865e764b58263270c76fd2aa937ae727dec44769. 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/ESAAI0256568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cf9fbcc36ce8c8a554ab85aea0dc415044e290c483e3b34734138684b50a15. 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/ESAAI0256569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd673518912645891a671c762095c2662c7493dc93b2c2badd30ef3c38289015c. 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/ESAAI0256571.