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 0x768935f6d6cfafa236d273a2ce72b93dc16a531347d10c813a71d88ce4bfc2bb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e4533e1-9ea0-4983-9aa9-bbbf9915da7e.json and https://artists.proofprofile.net/proofs/artist/1e4533e1-9ea0-4983-9aa9-bbbf9915da7e.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 0x5ee677fbfbce5b2dec4428dc90a1ac9c4a4a94e8f9f15da830d1c54b87e28d88. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9IX2100540.
Tu rentres quand à Paris ? (Réédition Cambu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb5983e804a372014cf1b36879d8a72d7cb83f3bf61eab969b94b828baddba4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR9IX2100950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e07eaec8150cc84903996b989a0ddf002710a57609ca8e0a5437568d79fd813. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:57Z), 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/FR9IX2100970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8742f0325381e67eb0734f22e982d46db4de7ce6e267e009e33b14bb7d17077. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FR9IX2101000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb64b3e1b991a080633e6b0b631bdb3b991d36723a80841ddf6abdb7e7a2e0e. 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/FR9IX2101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ba936a90c0125253f06ae14ed1f19011af3aaf49a6ce5d6e087c7a33bafa42. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:48:46Z), 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/FR9IX2202570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf735566149e34d42ba947023e68cc9a6936643d8af6e5f646ea93e9166c1de. 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/FR9IX2202580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3598602df44f29de7c74db223bc4412f54507c1178403dfe865267bcc7773a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR9IX2203190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4917a5465e64fa8c5f60be941ae4e62f6a08994dab6a432f0f9c12f1def109. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR9IX2203680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3121247e251e6c2bf059637b43cbbff41e3629f407f5f59b57e049430bee3eb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9IX2203670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc64090b30a7c73647df0fec3cf6546e92d22fc8ddfd2ff352a55d1bf9af8953. 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/FR9IX2300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9c49f80840633d65df2853c45b347b61c90ea8005293188871ea100334d930. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FR9IX2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b4eb07434ba3a993b1e02257edffcd0c4ead12214029fe3302295ee6ecbe29. 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/FR9IX2300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0f19d50b3fced0f9d89e8ccca756466ae81e848356692c4b94f902d068a683. 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/FR9IX2300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a890be72dff099794d104c45a6c5449f456b06f970f2f1608a714378031ec2d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FR9IX2300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc7f27e1fcaeaa810feff428569cc3e4985ada243a859085d2a45be1e356f25. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR9IX2301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713cdd5996cd32584242fb3d6e69a6017605c233176b9f92ba2be9089e38bb66. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FR9IX2301260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afb8cf9e45fb8301d4e7ae34e65daf7d63bf78840c36a476288a68935179b40. 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/FR9IX2301760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dddd52a3f30306f758ce49c5b845102efa9e971417125738027cf456df70ed. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:02:02Z), 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/FR9IX2301570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c12a59a4567660a3b9eac9f2aa856432fbd93814e524179553bd3dfccde2426. 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/FR9IX2301890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a2a1c5aea0b1086b09b604b5b95555e2148236daa82587cfc9724f9b846eab. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FR9IX2301910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897f44fba5859b3461a63f2c8168e5243819a9e0e7221bb8d25639ed6c53eba3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:38:36Z), 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/FR9IX2403110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daab7156b9f0e92838f4f39c307ce512266909c1a8bcd055c20c8f79c8a2f63. 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/FR9IX2403160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a884df077641a46518fcda6896c4b4ae5740b23e8e63c12a0d8d73109a9a6a. 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/FR9IX2403310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c2bb74a9b078485f7b5ca9acdaa27a137013158299acb831eacb2d9a6c166c. 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/FR9IX2403320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f35d7ec3ff9c0e39e752a53b1f9180d37aa1fda6bf253b573326f359c688fb2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR9IX2403330.