MooNs(cv.上村祐翔､柿原徹也､森久保祥太郎､大河元気､増田俊樹)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0150917689d42c70f1e54f5597909a85523d15003e5c8131cdf04d5d362879. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/162e5447-42c0-4de4-8f7f-38a7aca913ad.json and https://artists.proofprofile.net/proofs/artist/162e5447-42c0-4de4-8f7f-38a7aca913ad.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd952b9660e2310c606668ac49ad353b56289c5f00f4bae207919b48d5ca44d13. 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/JPK631505601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324da18469ea08a8606b4f79868217cdc3948016010f9ef7874932d80c46eb42. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPK631505602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0338be32e8c0329eff5f3a4c2ac1fce3c13d88a47bb14fd72483eff3c445a8f. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/JPK631601501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8c6bc3d63800cb46f8125b474bdfd08369519639a9abe4beda5f38bac2c776. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPK631601502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2bde0b5777603ac51b5b34422b82a95dffafab98ff290cdf844333ac134511. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JPK631700202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602f3e45ebc014a0ce409d72a92c22fe489596a2f3ac79c5c3bfe29ae62661c7. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/JPK631802901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c47340872332e064a8860c53d466a8ebfacd0d22669958ecaafe019d9cb281. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/JPK631802902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932bf4392ea18ea6237fba714f991110209e3e50ef36c54b56ab4a4d50010ca6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPK631802903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0290c26f9f29da14a7e6374a801afb8a05c8550b752c6b795c9771451db0537. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPK631802906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd2783745c9c04f7be14e83fae9b14da876b19448adea7d53af3c2d2188e114. 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/JPK631907101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0621249c88ec51eb90cd547dafe03e311b79969c1ed3ef784c1e87966a0fcd75. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/JPK631907102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb49b6bf58b4171c8751355e91e1f5cbe280f7879d8a2fde74b056ee6fdc462. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/JPK632100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4865351b0377f0deb002525e18d10e60738d511ca69290e2bd7ed6a8e9bacf5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPK632100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cb4deba8d772fcdc1ab41c80e013e96b36b58411582942da104a0e841d6219. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPK632202002.