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 0x444261c971d23770f49384eaf1bbdaf38f2d1735b3fc47529ec407abfbde954e. 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/b75ddcab-c2ce-4ada-ba32-b6e8c1b5cb7b.json and https://artists.proofprofile.net/proofs/artist/b75ddcab-c2ce-4ada-ba32-b6e8c1b5cb7b.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 0x382b1645bbf578139ec51ab175df46b62f0f5da6e90a2d316bee0072b46e7d6a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JPTO08740800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39a2f9910a5e8d19bb6f1d52f528d238efc51b169ae78ed5b88f42f6ccd9992. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPTO08929750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e71a389a50310c09a93214185686ead27848f19e8dc629ed3e46f6382bf4b33. 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/JPTO09434890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b14c3f463fed60b037a1c422649d455edc8c31f9928e0d74afafe720e6f680. 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/JPTO09434910.
アカシアの雨がやむ時 - 19710902 at 神戸国際ホール
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955d1a93cc2f1726f102aaa7032c4790af27bbb036cacbbc75a04947bce41f94. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/JPTO00702949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa7cb3f229015e102f5670c6b8f068fc6dc821c7aa1a198029c5ef008ab6e08. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTO08929650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a0ee1a86f869c09d4746a3ed37b5450d9f691f67dcd19f95739e9c466513fb. 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/JPTO08929660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd202370647c1a4dcad274fe024eaa4456ccff383594d18eb858e9e1c89befa6f. 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/JPTO08909770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8141ccf2f349f507820f032f340023e559fb6bc5d18c2031b0cdd3a3c696008. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/JPTO08740760.
渚ゆう子ベストコレクション 京都フェロモン菩薩～1201年京都の旅
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a75f3a0725b7339562ad876c4906471e5da4e85c51559b71dd9f6ff73ba0582. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPTO09504100.