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 0x79a260db4e7482a0f855238744b3d9f06a20193beb36abf601312b5bce6d63fd. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f462156b-1e28-411b-b707-f2509abb3753.json and https://artists.proofprofile.net/proofs/artist/f462156b-1e28-411b-b707-f2509abb3753.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kojinsakuhinsyu 1996-2013 [demo / demo] syokaibanA
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 0x910fe318a1ae578595e9cfaebd340d99851c4aee2f80274ce407d02a51dbdffa. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCJPI1958122.
Kojinsakuhinsyu 1996-2013 [demo / demo] syokaibanB
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30ee7505542e79ccb243c9215e7d29d5c0dfce384e023ee1edea4c3d62d8cea. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCJPI1958129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c9184b3bba5cc60849be2657f7f7641cca34279e06ed9583f8fe9044efcf90. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCJPH1837868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b225faf194d670b0031acfaea1c86271ca505f1995d12b48c67f94702a7b18. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCJPH1837987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03581ee4649e95a0ad570e44696d7172fd84c16fbaf4856a84035fc3593a4fb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCJPH1838015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d7287a54edfafae6c25ab0e55db1284ead54609e0220b482d9a7d1accf4f0c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPH1838419.
Kojin-sakuhinsyu 1992-2017 [demo / demo #2]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08104ea927e59d2dbb5efbc354f5be15ad70bb9957efdc1b6c73b5fa316acf0c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCJPI1824968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d286318cbe90df6f548303f4905e4f8c0132661153f04f62f480a5e564f7ae. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCJPI1824981.
Kojin-sakuhinsyu 1992-2017 [demo / demo #2] syokaibanA
Kojin-sakuhinsyu 1992-2017 [demo / demo #2] syokaibanB
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec461097352f15df7a62767b58e272914f4f8b4c3765e817f8fea4e722e4f582. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCJPI1958151.