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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7665714cef980db0881a32dbc98ca88d7c5a1f06ef9d106377645b902c40773. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6803a36-62f8-4751-a1bc-474250116e92.json and https://artists.proofprofile.net/proofs/artist/f6803a36-62f8-4751-a1bc-474250116e92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
DENNOU TOPPA (feat. INUKAI ULU (CV:POCHI), INUKAI LULU (CV:YURICO) & SUISEI LUNA (CV:YOUNAPI))
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d629c3f6976c1d6e0b77360a2b4ba0785972900c494d7590c887d3cdf9fd0bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCJPC2473051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed97683b089967250dee051eb08937512ea8efe1acf16cdbea00ab7cfb6f23f9. 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/TCJPA2494312.
Til the Battery Runs Out (feat. INUKAI ULU (CV:POCHI), INUKAI LULU (CV:YURICO) & SUISEI LUNA (CV:YOUNAPI))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fb8f898095c5a770189a67a7f3bb0cbd7c819a6c0350c5c7e93a52b999748f. 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/TCJPB2475510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f688437449138d8a6f44246d340e6818065435b578a2a07f08d654deed981c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCJPB2445729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde119875d76531af54a832f3e6c93cfbf409631311cf24bb7113003d060af24b. 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/TCJPB2423891.
bit by bit (feat. SUISEI LUNA (CV:YOUNAPI), INUKAI ULU (CV:POCHI) & INUKAI LULU (CV:YURICO))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1b1b79fcc237e662a6537879c4463dfd19d6763e99d7970ea52e0c514211b1. 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/TCJPC2444082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86317a8aaf174ac3bf1f5bb27bed022cbbcc3aff289b40db9ae3609cf7a353f3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCJPC2444081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954011925cb1fd46eb11e867ba967d4719dbdc6d6f2fc0c8db939f6577694d9b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCJPC2473056.
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 0xfcdc3d6c18cc4db025304247c2c91a971d790a07762b38f16184064410bdf91b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCJPB2475512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5f3e3c5cf723689e63a98942b47a232ed5dcdfc64aaf46c324a8b14ca57632. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCJPB2452683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985ccc9fb2cc82e91e7c28f8d09628839e0f3e38e96689315b48a8e82e0fad8c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCJPB2423893.