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 0x44106b2f16cdb3b29cd03f2f1a98a954c9b2b2083356b3411983afa22b1605f9. 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/fba63058-c959-455a-8ece-da792589ee9f.json and https://artists.proofprofile.net/proofs/artist/fba63058-c959-455a-8ece-da792589ee9f.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 0x4bc83379edef8eb42db570b2ab07496f552df00a746a792aab747f76ccbc5486. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES51898688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7205225c9098719d2902155ee10fb1156a9d78f2b2420491a3917a416c8c29f2. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZES51898689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d64ef20e5739506bf2cd69b20d6a2fb0494a666a6460bbb58ae270ca4700042. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZES51898690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8da39e8bb55a6f50f842aab7223539de7ee242247fa121022d940d630c37109. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZES51898691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dfcff3913ebf84eda02ae62ab8f73caf862588e5f52f60f1167a477ea3e118. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZES51898697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7588a5bcfb912b79004aa87a27bf0f195c60dc8c06a903f04a728eade9b5454b. 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/QZDA41975518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680478ea835c2836ebe4cc2340834f76a9916854c6a6f01c285724266f48c6ad. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDA41975519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692a945146780c338172d11426f3c55d13d5c1c5787ac497acb3c90e707b3eaa. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZDA41975520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb786bc83ed067354b16b7b5096a0af2875764361d8f63eff09f3af120ccff4b9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA41975522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5794fb3b23a26362e760acb5ebf707557f82a63882bbe7e2eef82ddcac14ca. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA41975523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf56f04b0bc4c450f0be4348e8f82e33f520d5dbf965f9618dac2d24f784095f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA41975526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1d132a22711f5133a1abaf3fdee61eec3b303661f0d8f39feeca5ba2a46db0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:55Z), 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/QZDA41975528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc7b3319615b8f99d5784bd825e445c0ed89c40167aafcc01aebd455a12f7c9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:40:52Z), 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/QZDA41975534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1721e046ab62bf5578b539db35fd0ab526d2e28ffce23d706d4d0eee15006ed7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA41975537.
Qu'allons-nous faire ? (Édition Confinement)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ccc84b1cde3c72e140d405db3f4a211fc4ad9aae8e5a4a965159911b72c8e2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6F2061609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e61676d030072577a914d9ef05a37e7959c4bd1e4f68c9966738f88b8d95d2a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FRX282259730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8811e43e07328b899e133d57c863e505fd8cfc0065510ae95a8e3c735d22abf4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX282259731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d792c29d964e6df696cf7da580f75588a48f092529b2449b482107284151b2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FRX282259732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a058b7325e47d7c7e7be50342a77d761cdd56e269492f4662f7067959631216. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FRX282259733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b7f9bf60fa3b9aca20a2436492a90f548ff23ec9e06735a3ac0c9dc264005f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRX282259734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc1dcd9b8122e71782863a5549f24090fbd7a9a67109402a9e2f4e8849ee5da. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX282259736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39f736440095f0d31eba8371ad97baf74edd33646847e4cb5fe3f0228f8c5d1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FRX282259738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba369c0a016cd116a00d7f8949a73c768b7095ff42dac2799c97096a20fd5eb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FRX282259739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24953aadaf02d0874d344fac6122b30e4d2a9476af341f10f5c668712744b980. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:42:03Z), 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/QT3FC2546947.