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 0x019c10104dbb5c988198bb92a2c91a7361b7033913e407822236e50b15dd665c. 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/0e91e6cf-cb01-476e-b5fd-74d3999cded3.json and https://artists.proofprofile.net/proofs/artist/0e91e6cf-cb01-476e-b5fd-74d3999cded3.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 0xc5419974048c75a715e2e31686833656fd48dec71adb4254f2805ea08c2a2f4f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNWX2139721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5204ae00c2d98e741f7ee2a998beca0e14cf0b165be060925069a071b424ce60. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWX2139722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e9d734936749d6ca1cd914c167878c89eb7709707d51f96310d20368d6f287. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWX2139725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5df9afbe653ec2628bc658b8f4858132f1fc19a9c62c1eef58a42873de6c88e. 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/QZNWX2139727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8ab68c99a077c1cfdb2fef972c253f38c4855b01556cf8d0c820610dae9545. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZNWX2139728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf64e1a38976e5cdab4bffdb8783f9df6212f2841d2f207a2ecb80a1c0eefee7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWX2139731.
Mix Piensa en Mi (En Vivo Vendimia Coltauco 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d79c55691fa4acf9b0284ddf1a67a8a5f9beaffca8637c50ccc2172dfc01f9b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMER2204378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78baa689dc5593388acec98ef7bd0949609f1da480d4247558a8368bb83dbc0. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ARIXB2309725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6806f87f10244b04817928484bea908a6f00fbd4f5b2b1695a0ef16522cbee. 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/ARIXB2312035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcf5aaf794904b0edf382f692cdf6cda79a3e5690ec28fc667ffbe31f3e5752. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/AR5UH2401507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b180d5fd004a7cb1173b6d27cb22af4105d0c21a5e120d8aaf00472ccbec2d. 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/AR5UH2502403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75b3dde16ce1c6755fb4c694e495f075f932212ac0cf6a14540c6b642619722. 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/AR5UH2503216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe545a68e0b23d32d34d41d05c050e985bb8398bf549975f96dd24c5b19b317bd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/AR5UH2503472.
Fiestas Patrias Mix: Los Tremendos Rancheros
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbf8fdff54d9ff7aad4e3315a6bd8cb8c95494687f876dc23a8f20099b35e02. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/AR5UH2400660.