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 0x01b04f4a37fff70f6b89f7db1f5c5e328f3a5fe4abe11d4091050b0f0560c91c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2073b8f6-de39-40b0-a6b4-7069714e7d71.json and https://artists.proofprofile.net/proofs/artist/2073b8f6-de39-40b0-a6b4-7069714e7d71.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 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 0xed20a87d7ea3f8a155d4f35afee055f6f7f8629181ff1daf68f7919d013651a6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR9W12131243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb74e4a6575a43c6531be1d530901383ca90b15094bd266481eca307ebd4198c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12131244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30debc98dc0fd65efc4ac346ec742f73fb857d28b96d01fda7fa5145d0cdb61. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/FR9W12131245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7c04144e7a4f99f56053ca54d86eff1a3e5f643e4ee681a1858132c9b633de. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR9W12131246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7e9ac6d286bc017088c180b304c28cec1585463f4162da91bb4489fa32fc70. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR9W12131247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b64c381c5c7d509cf2b00b57364944a1a5ceebd5c5f985915dd400e519848d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FR9W12131249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb1986b0dae1be8572f755c435d25153a88742061931a64a8a703e87c929f8f. 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/FRPZ92101310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0837c10ba2071033e1677280ee3a48bde9a25ccf06774471fd9575005e466a3. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/FRPZ92101330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916318562a8d70790388536c69ac1ec1a5714d89a18699f4575a9f227c8cd9cf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12226279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55708a6f658713b961e416033e0296cbb0db57d2215b00a61b4be8a0a4d33e7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR9W12226286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09db26249cbf2669a79223a298b331e3a181a0d28d41a122a16fad772a70d5ec. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR9W12226284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4733350ba6da19f125f85bf644c4ec6899fba1a977078cb9a997b7da77e967c9. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/FR9W12226280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10b37ed64ee1256ffdd88b0ffd124ea224449a9eda551c1c8a31c84eccd8e5a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR9W12226282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37c06523238b62ab961a7710667822b02f8395774571bc5fe84212a6151defb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12226283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8cf0053cc81b3ba74c5ed5f7eb8b6bb8967ef229dfe391e111f7b834157bc3. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/FR9W12226287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1185e263b220f10e47125da5a7e9d2f79fba3ecaae449053d35dafdb5126ccca. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FR9W12226281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb906174b791556cb6efec0e07755979d81b860dcb28a8bca23eb923db88756e7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR9W12226285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d704fb66056974561c00f45d4825b1eb12762965bd6d5c95729c7d8a136a8c. 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/FRZ052100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d704fb66056974561c00f45d4825b1eb12762965bd6d5c95729c7d8a136a8c. 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/FRZ052100167.
Un garçon ordinaire (D'après le roman de Joseph d'Anvers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3453c26805961a430c15f2c59652cdcc515e58d75cf477ebfb9a32704f84328c. 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/FRX202441633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c741d713d485137432e1b2343c0fe95017bf0ab27c9a135b08a8c6fc1cae4d1. 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/FRX202441634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36a384f34310260b2f9d402608f9ff6a80d819977c53b34af05498267641579. 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/FRX202441635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0676cfec2d63c0b300aab16424269197a7db1adef241a2716e66ddf119b2b96. 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/FRX202441636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1113b4b4ae2620c8124fd738341d5ba819c433b31479349c295b040e07192c4a. 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/FRX202441637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d70a9cee795e21690f87311fe2468fc23315db14cbdec4024e9bed41434ad4. 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/FRX202441638.
Le parfum sucré des fragrances pour adolescentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc60d15f74ad203df01b707d81b780319a1a7f6e54b6203531a9c88a3f90a069. 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/FRX202441639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f5d04c1787b86bbdcfb49eeaf1aef4a25a375adda385461a4b75618295927a. 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/FRX202441640.