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 0xe3e86c6706be748400e59ec73c2900b157f2713cdef20e67707d7d529ed953a6. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fe135b3-8f73-41bd-aea2-5d0327133e2f.json and https://artists.proofprofile.net/proofs/artist/9fe135b3-8f73-41bd-aea2-5d0327133e2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
機甲戦記ドラグナー BGM集 VOL.3 (オリジナルサウンドトラック)
To Love Again～羽田健太郎Memorial Piano Works～
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 0x9d1d26b08b808908a60527cba46a2de774cb9ac8a37a3d772e05a3221048c69f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPG101000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c7484c6325838115a865c96ea9d9c7967e066520dfb8d48d746e4116d1d048. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPG101000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a84894993d8992a6f03e74ba91082a32b9af330419e7e664e7b93b926af859. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPG101000132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4d5a86f37e9aa1e9c654b11f9f09a3b100c8e0629b18913a95ce7a1cbe9471. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/JPG101000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4c4f30047c4fe2c2232e82a222a5a65a6f6e1bf569906765bb04db9cdebabd. 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/JPG101000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7390b415b05e40c849112134c216dd946104972938e4e099e01bfccef6cfea07. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPG101000139.