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 0x7ba0945cb964fef7f00f1df8e097f6ed8b5ecc037bae46fbe121ee62ba0bd6d1. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8ae0c33-9d39-4cd7-918a-df146559362b.json and https://artists.proofprofile.net/proofs/artist/c8ae0c33-9d39-4cd7-918a-df146559362b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
邪名曲たち～「這いよれ!ニャル子さん」クトゥルーカバーミニアルバム ～
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 0x1ea387f457b7ec17ffd0a4a71609257d0749f44d2ee1a3e5f7c5523c0f05c448. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPB601302204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db68c4e762f34e34054c3d5d795eb80ac7bc7a915da23e501d5cd19554fa3f2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:08:23Z), 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/JPB601302528.
這いよれ！ニャル子さん＆這いよれ！ニャル子さんW コンプリートニャルバム
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ae115435aa23b3d629bca9dd6849f7334d9ae63a75ed811ab240a95bd002c9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPB601302202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db68c4e762f34e34054c3d5d795eb80ac7bc7a915da23e501d5cd19554fa3f2. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/JPB601302528.