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 0xa6f2a007b9815b59e4f2f6e267f7c57e055053f155f8101121e8d4913568c748. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0ec5f47-a8f2-42a2-949b-93f2236b8bac.json and https://artists.proofprofile.net/proofs/artist/e0ec5f47-a8f2-42a2-949b-93f2236b8bac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
いつか君の想いのまま花束を捧げよう
絵が描けない僕がA.Iと魔法少女を描いた件
秋色インプラントドリーム第2章 (可不Ver.)
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 0x68531544242123b1a786984d3f3f57a92182149d7ddbcfda6862cad92d177074. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/JPW462535673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f812edfc5b552cc7fb140963a0bb93f151a9c830ee8828b222f9d3bcb8cd0a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPW462553708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c86edc3633b259b3bd0b921c55ae09d91857da32d196c064789637f2637eb0. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JPW462553754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1188c3d4b941fad8025f3d0cf4386ecfdb39e136d1b00db02fa22a7c4f65cca8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:18Z), 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/JPW462553755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d2094beed23937dfd147136ba26e7afc2a71793ea9b13cfbda24b2c84c13cf. 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/JPW462553756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd420ff7a379ba3b633d51231ed2af0267f401898773a4a91b239099400a13ed8. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPW462417863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d934e44d232d574bc670620ed292929a793c77ad6b45c74d0782ed016e41383. 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/JPW462565522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d122bcc75ed3b4069a212d5881c644ce0ee8c0e142b2067a79c32baddcc45fa. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPW462580244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d3eae2288de3b90154b391d287ac86889dbb58fb4e76c90111cef788ed9ee8. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:28Z), 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/JPW462596025.