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 0xbf4700a6323ea9269a8d34ef0e2d75d8ac51b9e4b545530e043226b2aa679560. 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/2e7dde1c-5d25-4409-84a5-8c72bba5d5e5.json and https://artists.proofprofile.net/proofs/artist/2e7dde1c-5d25-4409-84a5-8c72bba5d5e5.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 0xdf74170e455852c836f802f1d3a750df728a03a0c292d6a4d19143747218bfa3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/USZBG1116146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4216dde4944b8884d18745491c138ce282a315648aae5ea2323316337b50a0d4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USZBG1116151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19341ebf9ee4b5015065299b3dcb46ff5c2963037b0de334028130527ed8ffe7. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/USZBG1116152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1743f284e94ab700d9c2c480521974fd1e8573b009d69ba8c98e35d35f1ff48. 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/USZBG1116126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521ed4061704f21fbd88b1514610fa16d49f450774f748cb6b4d75d0c7090573. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USZBG1116127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78a8483e852b6b83527450b80214a6f8074e8ea7790d93a013267db778234b3. 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/USZBG1116133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb76b79d6d8aaacf2bfa2c3b0a46fa560fedabc3c034f564ef84ee79b9d2213. 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/QM6DC1538189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b20727ad000bd3a3fd2e3a951793d224c41e7ef86dcf084bb07c1e9d1f984a4. 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/QM6DC1538365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24d1f68e7243f6fd09351e42d8b7ad4e7e9425c3446759a72f6bc8a1a50cd86. 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/QM6DC1538366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482d63407b808831789839bc9a9f5cb9d29eaef5be4d00eccae36fe923420758. 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/QM6DC1538368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866a7da2ef97e6828713c196d1138c5ff6571581268d50257afac74aa52a85e0. 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/QM6DC1538350.
Club Corridos: Sinaloa Rifa! Los Alegres del Barranco, Gerardo Ortiz, Alfredito Olivas, Los Canelos de Durango y Mas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c9d002ece307bd7aa0ce04571ec97eaf822237a807bd9d55f37fe33092821e. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USZBG1116128.