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 0x307465e632d86a2032019b300d4342a936f998c539427edf3ec6cffa84d3c6c9. 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/b9a3f59f-540d-42dc-a665-a57fd6e75c9f.json and https://artists.proofprofile.net/proofs/artist/b9a3f59f-540d-42dc-a665-a57fd6e75c9f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Panty & Stocking with Garterbelt The Original Soundtrack
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 0x06a18324dd5239f80e8f6c90bbd4de4bf3131f73191b2755e47ec9f9447a676b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG751000895 — a six-check JSON result.
No Question - TOKYO RAINBOW PRIDE REMIX Remixed by Mitsunori Ikeda
No Question (TOKYO RAINBOW PRIDE REMIX Remixed by Mitsunori Ikeda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffc2cd1f4eca329e08c6c85c4e2e2836f27049e04594fa39816cdca7c2c7964. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB601901519 — a six-check JSON result.
[Anthos]影河凌駕(CV.濱野大輝)、灯堂理人(CV.伊東健人)、チセ(CV.駒田航)、如月薫(CV.土岐隼一)、結城眞紘(CV.山下誠一郎)、清瀬陽汰(CV.増田俊樹)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543b4b408c50f76d6c6344bff89c5e0c5b6c7cc411574e4e07d18bc6b8a459d9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPR502151193 — a six-check JSON result.