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 0x22cad6e75a4f91f95a40cd242b77b3ae4f7208e5241ea5d06a00f8822413d590. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74009e67-fa0b-4e3a-ace8-6561030420e5.json and https://artists.proofprofile.net/proofs/artist/74009e67-fa0b-4e3a-ace8-6561030420e5.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 0x5b55e9bb7bc35a5b14cfc8c74da835b02857709ba93d85247ae71981f07fb7be. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:38:17Z), 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/JPVI07304630.
小鳩くるみベストコレクション 大きな栗の木の下で～世界のこどものうた
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95152803c69e346f9d0df9e7a4606b51cb461f0aa8f0de080f5845211435ab92. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPVI07602680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a31aa366bee6a69d1779e843a974cdd55679c060cc13061e1d3777b1723822. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPVI07602690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9d81fad3ca060ffb01fe3bf1582a98153a1915ad25933cfaadc11351731667. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPVI00502630.
小鳩くるみベストコレクション アタックNO.1の歌～こどものうた
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5462f42b9e62b89c9068bc9e344e93f090e7020c4b6d586f05dbbe8b5baf2845. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JPVI07201720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7854570f76147440526fa61890e2c2aa3208b953d1c4c15b770c7d7bbeec0412. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPVI07506440.
小鳩くるみベストコレクション 夕やけこやけ～童謡名曲集
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab86a89e3a6c8a4891c9b2764f76eae61c445d83c13c3a1b02c4f8ecc0ea975. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPVI07309050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb11bde2220dc4294ae0d49b1b60abfa0ea3b77250e65f687b6e3fbf1f4ea0f. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/JPVI07907160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c04313d39173842524a31af1f121114d991317e2d029922c571c866f9ddf92. 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/JPVI07307130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7854570f76147440526fa61890e2c2aa3208b953d1c4c15b770c7d7bbeec0412. 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/JPVI07506440.