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 0xcf7c7499e565d67388cdf296174b413851d9e4cff88e7166ae6f76f4ae48d346. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16a4b7b9-d136-4204-95a2-e5e8f5cf13c0.json and https://artists.proofprofile.net/proofs/artist/16a4b7b9-d136-4204-95a2-e5e8f5cf13c0.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Rap de Julian Loki, Hyoma Chigiri & Zantetsu Tsurugi (Blue Lock)
Rap de Genzo Wakabayashi (Captain Tsubasa)
Rap de Lavinho, Noel Noa, Snuffy, Chris Prince y Loki (Blue Lock)
Rap Sentimental de Yoichi Isagi (Blue Lock)
Rap de Chris Prince & Nagi Seishiro (Blue Lock)
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 0x13938721f62d59914508b4038de8cd48adcba0f115ebd097db5df2f8fccc749d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ7M2593191 — a six-check JSON result.
Rap Narrativo Final – Okarun vs Evil Eye
Rap de Obanai & Mitsuri (Kimetsu no Yaiba)
Rap de Zenitsu "Valiente o Cobarde" (Kimetsu no Yaiba)
"HERMANDAD" RAP DE ACE & LUFFY (One Piece)