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 0xd2e4fae6239c1daf57b35f63d3ba5673f32ad7ac22c8f5f956cb88c6c9e7ca62. 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/aefa08fc-38eb-41aa-a067-4fe70f6e45b6.json and https://artists.proofprofile.net/proofs/artist/aefa08fc-38eb-41aa-a067-4fe70f6e45b6.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 0x0e7f278da33b3ec94420d43b7aa787672e66a0d5a035453271835fdabea814a5. 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/FR96X1601767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b01a2b2f292e2495a18bba78d1a008a5f09208b6077cbe9a7d6c07efeb945f. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FR2X41778926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637d005ecd0cd674e07d09a01409a3a4196188241402bd8dca333b91f01dd49d. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FR2X41778934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39459ee07453f0a9b9cabc6633dcd01615c2d324595902e429282838486e0f76. 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/FR96X1601754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfa12c38c9a6aa4e34bbd5e1ec57b774962da5beab9cac8946ad9fd5aad810c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FR96X1601755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4226234af52a28f9310a95686d6fb53b7b6af428a9f37ab660a7f13c0effc8c3. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR96X1601757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad4f45af162a513ef2da977825d0b14ff0fa24d01a8e63253943708b35ae008. 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/FR96X1601759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db6bd3066efcddf9c8420a28cbffedb338f26c7feb8bc3602596ef79ad31d7f. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/FR96X1601764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e64e8695d7fabbd078a5582e7f26f04e0dd81454b6713e232b521f7e205acc8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FR96X1601766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662d2d85c8916933a1c0bd8c32e84a7107d60379f8ae0b794f7b115fdba6de93. 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/FR96X1601770.
El Diamante Negro: Éxitos de la Canción Criolla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f66a6f7bf7bc38d310a921f4a50db305545b5ce0c463103221c92854bb3dcb0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USCGH1992097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe277e911525b52480b7f34c7e94119fadd8ceac37ed7a61e2ac3f9a3ff28274a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USCGH1992098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f801703d70271a2edf4ec933972fb8050cc1b8694c44d762ae1da7435246f6b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGH1992107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4184cda6f9f15518b334f5a6bb760ed30fbbd3f82e8cc3b51be2c723646f8d3. 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/QZWDW2459838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2dec2bc1b553d138dce2962f32fafefcf9b82af5baac46c4b2bc147003b64f. 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/QZWDW2459839.