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 0x7210d7a67dfd1dd9f99f778385ede5ec5716648824c752cbf5602109fbaea537. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2999891-0b47-4b28-847b-ff1d457e4fd4.json and https://artists.proofprofile.net/proofs/artist/c2999891-0b47-4b28-847b-ff1d457e4fd4.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 0xe90328be81df588c19226da40adb902cdf4a1f86c70ba49ed93493097a8e0c13. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPY392402065.
アウトライン・シーサイド [feat. kahoca(from EoC) , ハルハ(from harha)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cfee60b4c8e88ebcf1a15203a72b73146fb9c28e15aed663cfa973989cffa1. 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/JPY392402182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85d7a631f4adf9b86bea44ea6dfddf67627e52941742c41d86ffdd07cf548a9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/JPY392402246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03ed346e7c633427bed10918b1a4c09e44817a1a440cad84a2f6d2cdaab8b73. 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/JPY392402247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebdb6e6440c4aade70f9cea9587d0dd906d9ddd19692200f99c25b5c8375662. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPY392402248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa33522ce3aff5c9623c5a625cd5d86a691ed87490748d8159cf879f015ef15. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPY392402593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469594bf1d394cb6501e0b27580edf862bca51112cee69f59f782e6e9da27c44. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:37:52Z), 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/JPY392503272.
また旅はネコミミと [feat. kahoca(from EoC), 一ノ瀬陽鞠]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4415c52e6fd52d6f39ceee5f958ddc2d772c0ad6355bca1566d6ffcdbba068. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/JPY392402594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fafdd2e58c6e79823b7a63264ed8cc906d63728fdec81ba303c554d58d83ecf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPY392402595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90328be81df588c19226da40adb902cdf4a1f86c70ba49ed93493097a8e0c13. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPY392402065.