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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f5b854a439f539e42643f31dd1b47a88721c5c7b37f96344d87b65876ad3f5. Chain 2 (Bitcoin): anchored in block 954048 (2026-06-17T05:00:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4299c15d-ba68-423c-bd6f-734f7cec1f5d.json and https://artists.proofprofile.net/proofs/artist/4299c15d-ba68-423c-bd6f-734f7cec1f5d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Visages d'Orphée: Cantates de Clérambault, Piroye & Rameau
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171ac0cbd73d6ed79cb2ad7208c6794ac065061e4eb54c35357e537b568ae052. 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/FR7JM2449010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2489a944a681e6e7cd728ce0085d904b1aee31b6127b5d2510ed0a789a5da96. 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/FR7JM2449020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12b73933d8d639c43ab0313269dbae02912f9ac4116a465f8c24b60af7364d4. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FR7JM2449030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038b6ee882386f455b88206792d59f82a0eace544715401d3152b1db0857fe21. 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/FR7JM2449040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb244ed8c70b96bb290ae23ec074f035a0bb9e963ecdb998781b4dac8f439a675. 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/FR7JM2449050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078e7f39ea47983e8bea49ac4d416d181d4cc01e02442268c638b554af055561. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR7JM2449060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f5178f3c6e39d1602ac73822a364a44b2900f007edbd1f5fc3e7556ec5884a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FR7JM2449070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4568a6eaecbcfca734303491b6bf2c16b3216771913483e46c61d1ed028f80d3. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/FR7JM2449080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd400168874bac15a261e60c856487cd4854a134da22d61fc40afbb3209942d4e. 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/FR7JM2449090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd71b7f8c6431413207df0ac4a32efbc219d03193aa94a806c9ff54732456e66. 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/FR7JM2449100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bb750638a8bd692526ed8e9668de93146b16890e07b2282a1f05083573499b. 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/FR7JM2449110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a62425adb8da480652fe8dc0bf73e8c223deb2c807408a1159b426c0240897. 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/FR7JM2449120.
Uppon La Mi Re (Arr. for Solo Lute by Thibaut Roussel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93364a36748cf46e38fd05b19e07fc6ac5ba7fa3d89f8bde943e46cb6a5ab119. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR7JM2449130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d53073cf2615435fec1650d25351d2d6ee84d3ab12aec745c953640e1554238. 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/FR7JM2449140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c04e740e5350c19bfed5cb70b8a7294ab6ebe9f797e8c777176b65803b8b9c. 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/FR7JM2449150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd5518802311eb0595dc4f1f064a6b8a38b7e4be4ec7e8c5e64f2b8ad2a796b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR7JM2449160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa47a8e26d847e4da9cd94f8d495fa7eee744263b721f720c6539e15508b941. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR7JM2449170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b9601525e2b4a355eb0a3d69502e816ee19fca8d9a74d1a2e973770cc55230. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR7JM2449180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deaa99c73246ae4c0d1b2ebb918dd3caf208e71be9d2b6f84a5ab7ed60f920c. 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/FR7JM2449190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d4922cea466b1eb08a16cb05bb7875d4d3105309a8abfbc4b7be7a6a588b67. 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/FR7JM2449200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebace8ea1ba0960238410fd17ca9105e8cbd5e29c0259b826c237d386119d879. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR7JM2449210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c4e7b90ff5035d67b6009b8977460b1d518e7523e3bde5458c3961e993108f. 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/FR7JM2449230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebe69c49cffb6fc064e040cda0a329dcb366709f2ce096997ad84270513fa3b. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/FR7JM2449240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e2a2da6a5bc7abf2ccdb3e3f0d03bd33cd1e8216bbc41ffb41ebaa008d9b0f. 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/FR7JM2449250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bb89fee04b73ce73564f8537611aebacecfc8418b120a55a043e677b7a16f1. 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/FR7JM2449260.
Forqueray: Intégrale des pièces de violes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b53c811ec8babb32f1a93b5228cb1e897ef158beaf1c124b4e28b7419c53779. 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/FXR522412001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf975097533c6fdb80aefa533be993f36df1f22b16278c92a886d3c0feba9b5a. 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/FXR522412002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280dd5fcce30d8b8a606107d8faf9cc0bd98707537e49349fe1673ceb1781569. 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/FXR522412008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cf6249a6abac795124fdb40e839a98b4c6009f8e41cf465bdf3798f667ad6b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FXR522412009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88ebc91cd7ee4a51d8d6cab186d41ff18f4a9d0d5a167095ca25b37d322769b. 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/FXR522412010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae15bd2559aa09a1517c4c05a9bb72083474833e3b0612dc4b9c05a85cf3a419. 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/FXR522412013.
Suite No. 3 in D Major: No. 5, La Du Vaucel. Très tendrement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe24100db4fc8bdccf0d39599044b1b00232243595729e376dfedacc00448fc. 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/FXR522412035.
Suite No. 3 in D Major: No. 6, La Eynaud. Fièrement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62d5accfb9c2b479c3d0b0fb0033583afc599aaf10217f683164317ff5e356d. 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/FXR522412036.
Suite No. 3 in D Major: No. 7, La Morangis ou La Plissay. Mouvement de Chaconne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865f3127a02198bafb76decf107ce1554200477f7208d9ad89d64897b52bd55d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FXR522412037.
Robert de Visée: Suites à la Mémoire d'un Poète
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cc3e0329eaac51ac4c490dba52f7c07f53b74c960d0cea227f2360db785995. 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/FXR522412702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe132310ccc8d948e5551cd15ee15d3ef63863bc5e3e7bd886da6a7eaec8dce. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/FXR522412709.
Plainte sur la mort de monsieur Lambert (Contrepartie by Thibaut Roussel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9684a8f748896be2ddaacd33ef37dddda8f09f2228eb8e1cce531cfc75f40f02. 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/FXR522412716.
Airs sérieux et à boire, Livre II: Pourquoy doux rossignol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97928c00e2442932adbbd0a363b9521610a4b5c8b4dfbe5991a097174be14f42. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FXR522412721.