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 0xefcdb093b57c6f8c4b018228e095ea3a78891d09b4190d2343199236860aae4f. 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/5af679a4-e346-4c4b-9e67-1d57e5792237.json and https://artists.proofprofile.net/proofs/artist/5af679a4-e346-4c4b-9e67-1d57e5792237.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 0x3575ac2c69304a6e029684978fd38a5a4e04cdc5662f90fced50486332248022. 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/DEH741106996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81de72094df1b0d6550768206c92ca377e77ff006c412fc4e680c3b5f1563ac. 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/DEH741107000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc954cc181fa10439f993239800ae4524ce521f86b903babf9efe85076def2906. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEH741107002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc614b6bcb776d47f5994953c4da9bf2259e3dd67de35951b8766f2ac7690eea9. 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/DEH741107003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9970a40501eb61c204873175e89ece32e946c22d443b5a592654e3b7b9444cf6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH741107005.
Electro Swing Party Vol. 4 by Bart & Baker : The Cover Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e1a7f6a3993a2237f763c173a2ecb36f39bf172e196698aa922d4ec5355e5d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEYG81911118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bff2b6261660554a95266c3a5abf72ec9ca33f1e85dfa08f3a3975830dc2d93. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEYG81911116.
A Cool Cat in Town (feat. Brenda Boykin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738d344e78b52fd6686617d125f295fb26fb7d6e7fc684c9f221060115219ce5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBJSH1229719.
The Craig Charles Funk & Soul Club, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64649043d1ac8673cef62ea34d52183d915d5a22c5a0948cdbcf5e7568ab1210. 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/GBJSH1320118.
Gocce Di Capri, Vol. 1 - A Mediterranean Experience (Compiled by Fabrizio Romano & Florzinho)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe0a72a59d96756882ee02efdbb1c11177d23538b032e379bc68845e4b22233. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEDW91400411.