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 0x64f183845b5eecc605cfb0672c2a006e58d1d10144ca932a57238b8dfa4d9270. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95322236-4360-45ce-a22e-01074c509e7b.json and https://artists.proofprofile.net/proofs/artist/95322236-4360-45ce-a22e-01074c509e7b.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 0x3c9313a04dd46bf4216009534958d6964f4863321e0dfadd5c45c3344e9b8c09. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBE2596622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd11c6f4216162f159ad82957584372d57d53ccedb356be988b2186989553b5c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFE2512764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb612694403f4670ff59a3fa47007f2512cbfa1f99a29da6bd2076103258b526. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBF2599177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3408947040d17a05ef8abfbe7511f8657e98041586cd5f0ec7f13482055ebd85. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFF2504529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f70d8ba359339016a1184d3bf09d9ee797c66f4c08bbf085b0d0acfea7d36e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFM2564230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60567c178e3eec7798e42693aa120559b148f522482db36dbbc6ac72d6290f0. 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/QZWFN2505415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2767993a5ad4561bf4c1dcc7239ebe1aeaa990f2507167c4872a4600d608ba7b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7M2582087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09066e7c8cb243f837cdc9fcd7823f2ad7e4a2334c6b99dc04c722874a285f4e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7Q2587257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781b3f41a9307b036db7741ef54ac5bbe276d8e517bdc284e8c98fb00c14893c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7S2585200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f33dd2aa5cc0e2cddfb45c82af350b790e5745d04ef21850f9716ad07aeb6db. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7T2596785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1ec0df15ff6c85940ff6b2d90d1f23bb62fafcf04aae1e49a190821751e664. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7W2570526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb120eb4a48a48b35121322da6a83a2e5c5d7cfe2979f8fea1cfb7fdd308e1c0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZZ7X2586232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a9b389ee695b986eb32f8190b784497b09e2aa9c75f911d5a49a7a40245463. 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/QZZ7X2598631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034d3dd1c68ae932524d7c94eb67fde1636fce1d8fb8e48d19a1fdee47232966. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QT3F32528757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25e99c63d1f1749fcf4798c60757268590f841d0adbea899b43f74f443fc6b3. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QT3F52532315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96df867902f758c765fde4e50fba623eb2804f7cb19b7c43470cf31c77efbca3. 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/QT3F62545331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959b190c1f7d894145b550393532e68571d1976bbb921a8439f16f7f98201ae0. 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/QT3F72511996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328c3f2ce008f59ef46b0dcf71cce935e276049725a1fab5aede6e50022ba6b5. 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/QT3F82587186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ea6ff8f444cbf8fced971c994ac8fa56aa6b1402abece9c4a51d7f89956b95. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FA2577205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90323cd2a8824cf173a61c9eee713ddcef1a862e51574da376ac5161bca20e28. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT3FB2585722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1349388b35eea9d704987f41ab8009f5da9f5c3d5e03c1d6d51b8cb18796891. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QT3FC2547926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a0da3c523cebaeee19392a960489e05c71b334c27dda3b785da8b5fe65f87f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FE2544413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db48839d863dc28c209b9908c6a576a02ac84ac256ed6234c1ac96e0270a489. 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/QT3FF2586919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1d6929bd7d2127248e42c0418bcaf1d59b59c2933ed2a2230bd11d21bd363f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QT3FG2556354.
Tap-tap boum-boum (Le balai fait le beat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066debc0a847eb78baf948a6e2e4564b8a55634bb0baccd7aaec94212d99a7cb. 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/QT3FH2554677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3690ff5397d8819ae8e040c8d3fbc1c95d3dcbddb6e17a7bd533445244cf2af. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT6E52520221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98bb9793073e5c0bca2694c08df6d88314997bc91d6c101a7f64289f548336b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT6E72510240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb07cf01187d9b076c1bbf6a7ea1fd69db0b0c9173eda4a911a223da7d7a9fa. 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/QT6EE2546314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b3bbf21ae653091d3edef28c27360506b1bde11ffbbd38b392a892e849783e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT6EF2529880.