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 0x263b85bff56daff948bd09243b001625cf9a40e5afbdc547ea07a744f2a423db. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c8922f8-699c-4522-87df-be6ba3a6745f.json and https://artists.proofprofile.net/proofs/artist/8c8922f8-699c-4522-87df-be6ba3a6745f.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 0x6a970215131134dbc380bea79bf11d9f21624da7b0141075c18d338f0e82a92c. 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/US25T0810474.
JVC WORLD SOUNDS <HAWAII> THE WONDERFUL WORLD OF THE UKULELE
クールタッチ COOL TOUCH ～Ohta-san“Herb Ohta”Melodies Vol.2
ハワイアン・タイム～ウクレレ・ソロ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f123c4443a9f51a326a238ab87e76722e42079a388fa87da75564127dc7030f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:26:09Z), 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/JPVI00507690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fb269f6f4960431456d5499c594ad46c533893694535c0ee24c425aa6db8f3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:18:35Z), 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/JPVI00507710.
デジタル・COLEZO!TWINウクレレ・コンプリート・ベスト
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f98c95fe5d7c54df421b897ae99c455639221f15eb08977dce05bd0404f13cb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPVI00713520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c70cc51e3feaa35068fe4014f10e447fcd20b10bc5a47c1647ed0925c50e87. 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/JPVI00713560.
HAWAII [The Best Selection from M & H HAWAII]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbc7df3905ada477869eaf0f9bebb5119de1326634247d5a3937a42e50f31f6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JPVI01518210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3c3eb375ec21c5dadfbebc344f285035732c186a79bb9db7fbf1e90672755a. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:34:52Z), 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/JPVI02001513.
Chopin Medley: Fantaisie-Impromptu C#m & Etude #3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0d66ee86a8d30c7424cf43b8b2b4416bc3ce12c7d4fbad3e5de1b86f49d3ed. 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/JPVI02001514.