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 0x7ef2e2e71110af55f1a08626a88301b695cc9c9d891e881a013a90549f27e046. 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/d9df889d-05be-42ff-aacf-6362829f2776.json and https://artists.proofprofile.net/proofs/artist/d9df889d-05be-42ff-aacf-6362829f2776.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 0x1862cb06cabd1341512070b6d5b8ed4115cb522f24f6dfe37135fe70d33c2490. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZDA52133258.
Klikken 2022 (Hot, Sweet, Crazy, Psycho Bitch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ef667076943b7ed71688c575e297a854697221a6b244ee2d91824a594a429b. 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/NO2DY2200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19891da2efdeb494ac03143162a327b435070cb6cdfe0f1a7bff7ab0ed303243. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB82293047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e5825f3317ac5a67136a135e92d39b1f8fe6e30d062057b45e8b7c49f9e63f. 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/QZFZ22388318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242bfd1887a9c913f3c1f9b3d4c8603897956494550ad74eaa3430a2aaf648c5. 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/QZFZ62343075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450394e417d75c2eb4d8e458406072b085f7125ad12aac79f0bf33124ca70a2f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NO8ZW2502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc046a74271f0ab0102f4fd3b05df2c97ac338429914a8ff1eb81d5d50963e7f2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:17Z), 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/US38Y2525804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa6957d0471e6ed7cb5e4248564105add1bf35afa96792a4764f8ba183bfff7. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:54:56Z), 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/US38Y2575897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bff0d56a20e784209520d9e2cb1dc6c768b485cd87ce2ff4431a672ed9022a. 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/QZWFM2332329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffb6680b178a397e1d60670caa41fb55dadc04e6ca85a52ce86ddb69c358c67. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN62353824.