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 0xdfbf3f4c41dfe6de48d1e35129ea17b94def5c6faaae5836b84cc55c3cbc4ffa. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e67f6c3e-8250-4bd7-b665-3102d5912d14.json and https://artists.proofprofile.net/proofs/artist/e67f6c3e-8250-4bd7-b665-3102d5912d14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zanzibara 9 - Tanzania 1972-74 (Masika, un souffre frais de Tanzanie)
Masika Mtindo Mpya - Masika - Le nouveau Style / Masika - The New Style
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 0x23b85ef9499822ddf3c120b75890eabb1d1c99dcdd1d9b026ec526348a2eaed3. 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/FRY397215060.
Harusi Imevunjika - Le mariage a été annulé / The Wedding Has Been Called Off
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb237c594db16e2c5508059214ef64e31e04060f115ac6e97cdbfa3e8212b0cc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRY397215061.
Kasema Hakutaki - Elle m'a déjà dit qu'elle ne voulait pas de toi / She Already Told Me She Does Not Want You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec397467698212c4fa713883682d548c4e92368f8e91ca68e81f018e46fef338. 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/FRY397215063.
Dawa Ya Mapenzi - Le philtre d'amour / Love Potion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02cfafb5d94d88a652f7cc53d2a43b2511b2af674688b1accf3095f0f74fccf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRY397215071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1d2a63973056688b09a98e9268aa54edf83e58730feae2132209064b7f3116. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USA561065582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cca83d2844cda051e1c18ecfd9b48f2bfa262e033b44abf9eaa6a23d6965fe5. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/USA561065575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc043271ef26109a07f4c2b418aad6e089ea4fafd1cae56ab28a92b6c0a699a14. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA561065577.
Paka Akitoka Panya Hutawala Ukumbusho Volume Three
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4abb6aeac659ce26f45194acb295e7be77ed86512775682f9d7dc32ed65b05. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/ZA56E1901358.