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 0x0f3ab5063bbeb684cd41f73ad070690a2580170ad599c66a1be4126fe813e052. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57a0f040-7bba-4ebe-b3f7-df09d809ae5e.json and https://artists.proofprofile.net/proofs/artist/57a0f040-7bba-4ebe-b3f7-df09d809ae5e.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 0xd40a77d4ce8c0f44317f65672086093e1fd8095e597a3799c8556fdcb3b2dcf3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USHM82100958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40a77d4ce8c0f44317f65672086093e1fd8095e597a3799c8556fdcb3b2dcf3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USHM82100958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921d75b26cc7d11e5ca0c088a62e1e9cec13766c717155adb1179cc7bb36a9a7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QM7282373587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921d75b26cc7d11e5ca0c088a62e1e9cec13766c717155adb1179cc7bb36a9a7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM7282373587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52117f535fbe6c50a29942849ae3b45b841cb98cdb75ce19e66d8743e9ea971b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QMDA72376082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52117f535fbe6c50a29942849ae3b45b841cb98cdb75ce19e66d8743e9ea971b. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QMDA72376082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f0e8dae5efd30fa9dc279a3bea51c696425fc4cc94d22b768edff13873b8a1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMFME2386348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f0e8dae5efd30fa9dc279a3bea51c696425fc4cc94d22b768edff13873b8a1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:48Z), 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/QMFME2386348.
Desde el Rancho, Vol. 1 (En Vivo desde Rancho ''El Cadete'')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864e6f08394c932230ffa72c4edb6ca5b0dfecad4d96a0964f8e039ecdedc10f. 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/QM6MZ2401160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac96d2883773cc12474971e039021fe82b45dd9fee7d98c8b03cfb55db050944. 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/QM6MZ2401161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d0525c5ea2055820352a8f49a307c2029f71534714c69e0c6f694ef7747c65. 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/QM6MZ2401162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a2a1ed8e9f807506145d4218b86332758705a3c6ab967bafa98fc276237d46. 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/QM6MZ2401163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6bea97bccb46af298f9c2ad019ed7cde6bde6f970e0a9ceda11c9bb8bddb81. 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/QM6MZ2401164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb993e82775f3756c58a8a96a1280f53993293c34031dbda431e9e18ab93213b8. 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/QZZ8A2411961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb993e82775f3756c58a8a96a1280f53993293c34031dbda431e9e18ab93213b8. 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/QZZ8A2411961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d26c2c3227cfae7d3fdbe10ed29b4282bf000f0f2a7e80c7dea83f1909e759. 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/QZWDE2597979.