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 0xd0563ae1f90911a7cb09a6fc275b50d4bea24ec108c99367e1dac05ed44ffd1d. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09d4efa6-24d3-471b-8c67-09781c0eb6e9.json and https://artists.proofprofile.net/proofs/artist/09d4efa6-24d3-471b-8c67-09781c0eb6e9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Ootori No Kuruhi, The End of the World Vol. 2
Ootori No Kuruhi, The End of the World Vol. 1
バルバラ矮星子黙示録 -アルセノテリュス絶対復活光とオルフェウス絶対冥府闇-
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 0xd96f55db3aeabfa41f1e70eeb38b328fc574230e7f59117ebea14c03d4756898. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB621900335 — a six-check JSON result.
テアトロメダ・テアトロサウルス -光の子と闇の子の存在による可能性-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc758f0abb4361b5bfd9b783b70ea61266cc0fc887c81564ade7983d8d86f42. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/JPB621900337 — a six-check JSON result.
異邦人の揺籠歌 (エトランジェのララバイ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440f59b12492d64c50960bb2226efb6246b990d92fcbe39aeb5664128a9a1131. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPB621900339 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2525b780c6514686ef7dcf997ad922ca69a88e364fb060dadf1908ece4411340. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/JPB621900340 — a six-check JSON result.
バロック・ロック -ねんねんおころりよ rock-a-bye, rock.a.by(e)-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c66d5e2fcec369991a1e69e67db61e02c64c37bcebd30e45db097c07cfe329. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/JPB621900341 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d20fb6b38387255f8e15b5024b1c33fd5fcead7e15e541fdf539361007adc9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB621900345 — a six-check JSON result.