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 0x85a482186023562deedc82227603ea202b1165bb20bd83d06d62d2c792b38835. 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/9a49df2a-4605-4649-991a-47384d4569c8.json and https://artists.proofprofile.net/proofs/artist/9a49df2a-4605-4649-991a-47384d4569c8.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 0x1560ed8db8113976a66504feb61df1c7da6ee6b87ab153dbf5913e378fcf5cf9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPA951200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965d90556305371f53bbfb1984ab9e941f352b2a0c6a67c9d70aa98c574aecbe. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/JPA951200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b372c177342c0052689da4e8aea91081a268df1c8ed5559060b27fbb255bf48. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPA951200004.
毎日新聞落語会 春風亭一之輔 「不動坊」「千両みかん」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2837ed327d6e427521ef54a4b95640387589e4abbad46156ad666c5be738ca4. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401200855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f03be2ef3eaf4802d84b850f271592a1f5c78f97c3ae93bde8e14b53b9f3c5. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPA951400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426f6dad58577420a174a4404b02a42d28bbbb56a79b3ca08d5cab79591f750b. 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/JPA951400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae48957a730a288a12ef5ed8cf4a1cd8b75d0ec4f64fda22a842621a5ca50e04. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPA951400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c05abccdac24268a32d60663f384681485a5a0bdc2584c3a0e51bd6bae0068. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPA951400004.
毎日新聞落語会 春風亭一之輔2 「子別れ」「堀の内」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab5e38c5af0bf0b5dfcda6c5ce4489e853c7b276952f3b65d852a22302bf1fc. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPP401500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf105a63089bdf23c713306d0a856c4add066d5a444c6eb445f7fdad99c86754a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPA951700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa86ac9cdc4aee695131656772b6939221c592c99263cd791075390a3ba9f52. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPA951700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645c29e4c3e02ccd96588c9be9f24eac481758a7e64da86d1f858437276e7a94. 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/JPA951700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8d1207341e240dadcfbd588886ea4ff4f48aa4a5b7fc2c767f7dc401d913a8. 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/JPA951700004.