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 0x810dfdf3e388aa67b607e8836bb934146cc162c644494cd2f402937464b28b76. 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/f93904cd-0d10-4cf7-82a4-5878794aa995.json and https://artists.proofprofile.net/proofs/artist/f93904cd-0d10-4cf7-82a4-5878794aa995.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 0x9e058500f6e8e63211ca9efbf0aa8e512df2cab294cbd5d4c8619582f03dd23d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:07:50Z), 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/JPX562100139.
アリスのマジカルハッピーワールド
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1ba5022627f013dadd7ea1ccd6db363eb1d36f2600dece351a03f3b35943a8. 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/JPX562300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac9aa7265b369f5cc1d66edef288c146aa51c622df9b61782247a4df2e2f8d0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:33:12Z), 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/JP92Q2301957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5254752e5d0864515394a2add7efd893ab76591bc630c36d81655c1498f9d739. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:39Z), 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/JPX562200432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5254752e5d0864515394a2add7efd893ab76591bc630c36d81655c1498f9d739. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/JPX562200432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1ba5022627f013dadd7ea1ccd6db363eb1d36f2600dece351a03f3b35943a8. 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/JPX562300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48b3bd76392d31d8a9e7c775c8b9f5be1b2f0a171eb3c910836693baafb7cf3. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/JP92Q2400459.
この薄暗い日々に、愛と、少しのメロディを。
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7216aed6aa71a352ca6180f8fdbe25c699448c0e74db11b73ae56d588ff18165. 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/QT66J2527457.
バブルの素敵なフルコース (feat. 初音ミク&ずんだもん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c61d4543fc256dfe49c1dd84468fc68c96a0b15dbc915aa6635688624ac626. 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/JP92Q2502790.
アタシ・ア・ラ・モ～ド (feat. 鏡音リン&初音ミク)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8826e583e5c6a8a85a647ad459a53119639ad5899ca38a07b3eec1fdc0e626ed. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JP92Q2502789.