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 0xc06c9bbdd25426918018880a19e88fece4d0c10030eb4f9bfa4f785c0dea4384. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5259c6af-a77b-4f4b-8a63-9de23e7fcd3f.json and https://artists.proofprofile.net/proofs/artist/5259c6af-a77b-4f4b-8a63-9de23e7fcd3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Plus Nine Boys (Original Television Series Soundtrack), Pt. 1
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 0x15e8490660e74322a210cb49b21238119bfc3291b5704bd8c3e8b62950abfb4e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/KRB921932710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d03e8d6230cbbc1097aadf8c729c1d0f585ddb0de853cd90fb61a801d407743. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZF452008758.
Dae Jang Geum Is Watching (MBC Drama) OST Part.6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068655f196068f6938bca6fccca07dd01584503938bc140277d88729dda58217. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/KRF401900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e05c8eebf4e8a696cd8da15b08d8f1e4eec2089a7b043fb42f510a63d2ca08. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRF401900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0005ed4f5384c9fee6803a5ac7053fe68c6d2e338110864bc860fe6af69be334. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:09:58Z), 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/KRMIM1908914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c16b98b508753a06a9ce7f81b3623ea58b6638e1918220ca20876322b5ac38d. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:04:05Z), 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/KSA012103783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cebcc30f852e71b623aec30ac91cfa72949bda1bf4b5e29183f474687bb0ccf. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/KRMIM2330805.