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 0xfd4c1734fe52eec0aafec11f93e8de9485aa185e28bdba4a6ed4c6e4fa581778. 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/b06f8cf4-ebb6-4904-aaee-20c56b793e9e.json and https://artists.proofprofile.net/proofs/artist/b06f8cf4-ebb6-4904-aaee-20c56b793e9e.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 0x3484c31c8d902fcabf0be4f62cbe4a1d43857b92e51e6662108d204c4e192982. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ7XA1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca135036f743f952e946c5a1d1ff9216173755b2d3dc80b51cc9c94c92718239. 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/TCADP1851319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011ece3abb6422dd04d489137fd82d48232b8d4d48ffd0804b8ac97d984eedd8. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/TCADP1851322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f71321a57722ed1acd5b48ef96bb3778b14e1a2acc3b37557dc8a649e3c235. 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/TCAED1923126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95197084f9ec3b072db0f3d42310b5886fd8ae08c2489d64650e759dc8e1850. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAED1923192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705066aab39c9b12ba0a849eec4b8a0c89fbaf1ebceb0212d75a1d2ac0a1e2d5. 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/TCAEA1843966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545fcbde5b62f791fa3008997fc10ccebdd5b7c1158a157c57eaab031d26ef97. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USL4Q1981786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7666ee092d2dcbebccda428cdc00ac687eab88334b8b34c5a9a8efe2a982afc5. 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/FRZ052000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f393968877d6ad559ce3f18841af2ca2553cf1863e2885333a2da869bd294b7. 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/FRZ052000287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455c776faecd00e5ecb17a9a117e894e839f8375f71f663dd1fb14a9591415db. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRZ052000291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b413579535e5c5d0c4ab05211e63e51b6f9df4ae48ca6683f6ab9ffb9d82397. 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/FRZ052000292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31866aa22f3b94b25b8faf8a89ba79edf480c12afe424b602119e7b8caf13d4f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRZ052000297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5118a9f75b982267f4c39dab7f870b0c908923aaf2da5cde0a413afa081bc4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAFJ2125495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e33ff1e540b50b4adf066623740a135cb21e4d285cbbcfb1fc50e719ef81ff. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FRZ052100122.
Haut les mains (feat. Lesky & Koffi Masta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8718d6e60d60ba4939ba9aa8857aec76d551894ff5a67fdb9dd486acd6755c9. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRZ052100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356866a5c0cb5ec79b68b315fb31a2bbd40a16794484f998d059d658367f0b02. 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/FRZ052200540.
Petit freestyle (feat. SixSaidIt & Neissy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7f9ca5916ed853b6af37d3684f3d015b912d7d17944a367f280404495c8fe5. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FRZ082300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f055cc50b44bc9495d43f667e0baed7a7f0c8f0564721a12e40ebe6fafdcb0a. 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/FRZ082300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3acf7585af5fed09f43178fad5fc8ac8fcbf492107945e749d8f801dedf2b2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRZ082300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe818a772bc6f1db42d707dfd175a85c7299aec354ee6ff58c102b3d5c5e7e13a. 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/FRZ082300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e490236aa2d6d3c72a5f51fd9c90939eec5b46daad62dbccda1731217bd47d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FRZ082400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b2a0d4aded57aa9581d0a98ae6a809b2466efe13b5bd1ae4fc03336af290ed. 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/FRZ082400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789ca93a2fce57afa1a4843c0588aadbb9440d59c9a9a0dacc44a52de91527d5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FRZ082400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2edc5ca215e8b9df4eb262f5007e020986f2c3fa70cde37031df4cf04f15f94. 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/FRZ082400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc6fb0f70ae1f0ebc8043da0acdb3dba7bd9971c59dc787fc020851a7344fd9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FRZ082400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee5d9125d3e4d27b1484563b224e8c095950dc6505273dc8c7a727a4ff53ec8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRZ082400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba27f7376ad3c55a78a2cee626fe4962d879765980dbd0edc1a023d3df115e6. 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/FRZ082400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ae06322999c7a1219bae11cf0b2f528fbfb4f1ce8a66a2f43ea429db393100. 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/DGA0Q2496802.