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 0x4d900511b57e37e554cc06996c5622152f374c6ce809833dd6d80c07f693036b. 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/5cbc848f-b8a4-42b2-80dd-2427df9a710e.json and https://artists.proofprofile.net/proofs/artist/5cbc848f-b8a4-42b2-80dd-2427df9a710e.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 0x8070c062c7e31622bacf1de72f39708166a9168878d09e3b3d2821378d6b6690. 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/QZTBB2436636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d443c41f5a576034f82f35ee3b0a44f6079a8f04920aaabcbbe40a120f84947. 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/QZHN52406530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb2aee39f9f05cd82ece6ab6edc67a521e6578f41a64f2371f097589c4775d9. 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/QZHN52406531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9068e9b6a159123ed879841b9789905ee67db37ee55264a0e9095b75d97f252d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFN2390581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ae1653d6c698fb57b739ab105029a20d8aa7889bd7a235b0aac7aad1e2a830. 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/QZTAT2305163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86800f3cacc66c3574f88ea43d3b24f441ae5458d95a848ad1585657f8a4202. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN82354364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5734383e598e2541a721dabc266eecbfa89e1fcbcb6b0f74e63fafd9845464e7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES72317740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea779a4986fc8765a816519fc81ee1385b97f2be6bb2558e524f1436ec714fe4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYZ2369422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cb0e3bc703c4c1d43857a3debac9a8ee195f8db54cbe56ed791f3bb7268bcc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92297974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b234e33daf2e7b3d7c973847feaf00958f328f938a12d982922ef5765c45b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB62208786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139389735a5f69cf30b0762a838e22c78fa9664411f5e0a3701df59ea8133f95. 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/QZS7J2286945.
Ir a Buscarte (Remix) [feat. AJ & Marcelo Rubio]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde764e6cbf98259c97c15b48edf434a7ed8527cc41c37d936d1415c07d84b70. 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/USLD91740400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1304974a30e344d5110a8a5451c185c4a2a57f2bd3675920339cc5e366542a8. 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/QZS7J2266311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa313ffbc9c6f3643cde397eea625e123e9b032425a6a16d29564bfe767704033. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN62244761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58fb014a2865c5bf32165e9388efa7cd891466b348931c525bc418c9537ed8f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN42278115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f91447ae0c2f1fd2f62c2a384b6e3e4d4ba87bd3283f6ede8e00a70af652415. 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/QZK6H2588521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf891412a3bfdb5aab2af1129d6863634dfaa09e72cd44ddb5f90f7f1eef1ea2a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES92564178.