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 0x967977f8af067a09b805307ff10dd9e3f24806faf002174fc85e09f1731cf574. 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/ec9fe893-b892-4eb2-a273-11472432965f.json and https://artists.proofprofile.net/proofs/artist/ec9fe893-b892-4eb2-a273-11472432965f.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 0xd03edff3fc6affd06569f010024d7343fc1368d13b0c7a537f2e06b8fbe2c8e0. 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/US7VG2203636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaac4e387c4b52e4afd7e30140534e76918c4e5bfadd9f4d680a755b8d04c261. 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/US7VG2203634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954ed953c546e18c7dc3f148c45983e696438ac78b7b3f622e61fc1f001e5df0. 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/MXF160001495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3076ff566d947714e261032c62dd4a60cc2c91ac149da3f45cf383d76689f3b9. 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/MXF390404134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e7ecced4b56185096b1cdbc852ad1eefc8878b16eab187cedf02867e5ab633. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/MXF160207721.
Peerless 80 Aniversario- 24 Corridos y Rancheras
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e7ecced4b56185096b1cdbc852ad1eefc8878b16eab187cedf02867e5ab633. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/MXF160207721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04391018cafa8f032bbea0afaefa7444a7141a2354706d853afab18b57fab467. 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/MXF160300534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3003182c65b7b1dbbaf569cfaa7eced22be4cc849bcdf2493128f74516927a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/MXF160300521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954ed953c546e18c7dc3f148c45983e696438ac78b7b3f622e61fc1f001e5df0. 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/MXF160001495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773c98ee816b4ca94f353512022262b609d920c2c26a4ebf2a86900413437677. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/MXF160207722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d926f51ba821d6f10e76e0dff62c4fa0a29dd337d99c5addfa2f0ca0ef2f5f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/MXF160102093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6313d6577303843c32138fd5c83434568369e8ec4bb9118ab999a7b32fad53a9. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/MXF160102092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a8c2eaabc2c3ca1ec9f1aca553c024c174c31940ce607912f442dcdf118905. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/MXF160300523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88eb8b9a6aad6d98f0985a05375dc6bf606f5c63678416096e06c5489c5e4bc. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/MXF160300515.