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 0x3929cf68b2af5bc5727605b39164d68d759f4d822a112745df5422a3b27cd5c6. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d633ad9c-4eb3-41c0-a4dd-af1edc76daca.json and https://artists.proofprofile.net/proofs/artist/d633ad9c-4eb3-41c0-a4dd-af1edc76daca.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 0x4695e51823181aa8e8d99f438f05f4394df370a6d38687ef69ffc2f2be23c0a0. 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/QZ6K21000025.
Roxas (from "KINGDOM HEARTS II") - Lo-Fi Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4118f174675c8b9e7c5913196ddf58cba4da6c17d8c9157cdbb323d1566f9323. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ6K42100714.
Bandicoot Caravan (from "Crash Bandicoot") - Jazz Hop Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08c9a4b63562c363c75a476cfef3e85e3b4f679836f5464ac55ac156076a59b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZ6K42200437.
Frappe Snowland, Sherbet Land (from "Mario Kart 64") - Lo-Fi Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fbbdba1ee79ec40d0502dd26e4a015ec4f740dbc29b64bfc82205c36a14251. 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/QZ6K42200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe134993a5b2f013bb81c37c5f0f6d787cc40fea29f48bef5579eba6626766fba. 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/QZ6K42200041.
My Castle Town (from "DELTARUNE") - Lo-Fi Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929f4e8ebf6a05ead7413d4c847f3eef0d977d19b0a4abf2a52641062979dd1a. 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/QZ6K42100491.
Sound Studio feat. Tabitha Louise (from "DELTARUNE") - Jazz Hop Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5083fbbd535c6aa931e084c938c5d71250e88595642a36e7c76999d2069e04a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ6K42100566.
Yuna's Theme (from "Final Fantasy X") - Lo-Fi Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fea25f707cdd839089c3fef61a6990548259ea8a27009167572d18774bd165. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZ6K42400014.