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 0xd7a6daa5d05c4acdf4b0edc1d66944a5f361944f723f3c8ca13b5d4bb883c279. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a32fa5dd-ca7f-48aa-be24-0f5cdba679b1.json and https://artists.proofprofile.net/proofs/artist/a32fa5dd-ca7f-48aa-be24-0f5cdba679b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x14353d7f9fffd57d583936de834c182f5d82f257b89a7f8264692844c4ddc1ef. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:50:24Z), 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/JPCO00530910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0685c1ea94832de7d5b17161dd7ac360802a8c8e1fb3e9907ff2800529315b27. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPCO00530920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aae79f77819ab1f75b292160e03845b3abe467cac3d538f1095f365d5fe22a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPCO00530930.
あの人が歌うのをきいたことがない
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1935427642db65a20d9a63d2108076d543244a0aff03eeeb739b1cc510266299. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/JPE502000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e60abef91da4f01d06cf2974eeab0bd6b5a0b8697906f0a8600481612051d1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPE502000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51de484c247cafd8e9ab4aec4137a976d50c567d6b690b4e7f1dc0e4193ad65. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/JPE502000017.
テレビ東京系「共演NG」オリジナル・サウンドトラック
鳩の撃退法 (オリジナル・サウンドトラック)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0685c1ea94832de7d5b17161dd7ac360802a8c8e1fb3e9907ff2800529315b27. 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/JPCO00530920.